[shared storage] Consolidate FLEDGE's shared storage modifier methods

What:
- Consolidate the existing modifier methods into a single
  `SharedStorageUpdate(SharedStorageModifierMethod)` method.
- No behavior change.

Why:
- Enable Batch Updates: This prepares for the upcoming support for the
  JavaScript API, batchUpdate(sequence<SharedStorageModifierMethod>),
  allowing websites to perform multiple modifications in a single
  operation. Explainer: https://github.com/WICG/shared-storage/pull/199
- Improved Maintainability: This simplifies the Mojo interface and
  reduces future maintenance overhead.

Bug: 373899210
Change-Id: I26ad3d9048709dfcda2614d573dcea6d60a971aa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5953467
Reviewed-by: Dominic Farolino <dom@chromium.org>
Reviewed-by: Russ Hamilton <behamilton@google.com>
Commit-Queue: Yao Xiao <yaoxia@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1373433}

content/browser/interest_group/auction_shared_storage_host.cc

@@ -55,56 +55,42 @@ void AuctionSharedStorageHost::BindNewReceiver(
                                     .worklet_origin = worklet_origin});
 }
 
-void AuctionSharedStorageHost::Set(
-    const std::u16string& key,
-    const std::u16string& value,
-    bool ignore_if_present,
+void AuctionSharedStorageHost::SharedStorageUpdate(
+    blink::mojom::SharedStorageModifierMethodPtr method,
     auction_worklet::mojom::AuctionWorkletFunction
         source_auction_worklet_function) {
-  storage::SharedStorageManager::SetBehavior set_behavior =
-      ignore_if_present
-          ? storage::SharedStorageManager::SetBehavior::kIgnoreIfPresent
-          : storage::SharedStorageManager::SetBehavior::kDefault;
+  if (method->is_set_method()) {
+    blink::mojom::SharedStorageSetMethodPtr& set_method =
+        method->get_set_method();
 
-  shared_storage_manager_->Set(receiver_set_.current_context().worklet_origin,
-                               key, value, base::DoNothing(), set_behavior);
+    storage::SharedStorageManager::SetBehavior set_behavior =
+        set_method->ignore_if_present
+            ? storage::SharedStorageManager::SetBehavior::kIgnoreIfPresent
+            : storage::SharedStorageManager::SetBehavior::kDefault;
 
-  GetContentClient()->browser()->LogWebFeatureForCurrentPage(
-      receiver_set_.current_context().auction_runner_rfh,
-      ToWebFeature(source_auction_worklet_function));
-}
+    shared_storage_manager_->Set(receiver_set_.current_context().worklet_origin,
+                                 set_method->key, set_method->value,
+                                 base::DoNothing(), set_behavior);
+  } else if (method->is_append_method()) {
+    blink::mojom::SharedStorageAppendMethodPtr& append_method =
+        method->get_append_method();
 
-void AuctionSharedStorageHost::Append(
-    const std::u16string& key,
-    const std::u16string& value,
-    auction_worklet::mojom::AuctionWorkletFunction
-        source_auction_worklet_function) {
-  shared_storage_manager_->Append(
-      receiver_set_.current_context().worklet_origin, key, value,
-      base::DoNothing());
+    shared_storage_manager_->Append(
+        receiver_set_.current_context().worklet_origin, append_method->key,
+        append_method->value, base::DoNothing());
+  } else if (method->is_delete_method()) {
+    blink::mojom::SharedStorageDeleteMethodPtr& delete_method =
+        method->get_delete_method();
 
-  GetContentClient()->browser()->LogWebFeatureForCurrentPage(
-      receiver_set_.current_context().auction_runner_rfh,
-      ToWebFeature(source_auction_worklet_function));
-}
+    shared_storage_manager_->Delete(
+        receiver_set_.current_context().worklet_origin, delete_method->key,
+        base::DoNothing());
+  } else {
+    CHECK(method->is_clear_method());
 
-void AuctionSharedStorageHost::Delete(
-    const std::u16string& key,
-    auction_worklet::mojom::AuctionWorkletFunction
-        source_auction_worklet_function) {
-  shared_storage_manager_->Delete(
-      receiver_set_.current_context().worklet_origin, key, base::DoNothing());
-
-  GetContentClient()->browser()->LogWebFeatureForCurrentPage(
-      receiver_set_.current_context().auction_runner_rfh,
-      ToWebFeature(source_auction_worklet_function));
-}
-
-void AuctionSharedStorageHost::Clear(
-    auction_worklet::mojom::AuctionWorkletFunction
-        source_auction_worklet_function) {
-  shared_storage_manager_->Clear(receiver_set_.current_context().worklet_origin,
-                                 base::DoNothing());
+    shared_storage_manager_->Clear(
+        receiver_set_.current_context().worklet_origin, base::DoNothing());
+  }
 
   GetContentClient()->browser()->LogWebFeatureForCurrentPage(
       receiver_set_.current_context().auction_runner_rfh,

content/browser/interest_group/auction_shared_storage_host.h

@@ -9,6 +9,7 @@
 #include "content/services/auction_worklet/public/mojom/auction_shared_storage_host.mojom.h"
 #include "mojo/public/cpp/bindings/pending_receiver.h"
 #include "mojo/public/cpp/bindings/receiver_set.h"
+#include "url/origin.h"
 
 namespace storage {
 class SharedStorageManager;
@@ -40,20 +41,9 @@ class CONTENT_EXPORT AuctionSharedStorageHost
           receiver);
 
   // auction_worklet::mojom::AuctionSharedStorageHost:
-  void Set(const std::u16string& key,
-           const std::u16string& value,
-           bool ignore_if_present,
-           auction_worklet::mojom::AuctionWorkletFunction
-               source_auction_worklet_function) override;
-  void Append(const std::u16string& key,
-              const std::u16string& value,
-              auction_worklet::mojom::AuctionWorkletFunction
-                  source_auction_worklet_function) override;
-  void Delete(const std::u16string& key,
-              auction_worklet::mojom::AuctionWorkletFunction
-                  source_auction_worklet_function) override;
-  void Clear(auction_worklet::mojom::AuctionWorkletFunction
-                 source_auction_worklet_function) override;
+  void SharedStorageUpdate(blink::mojom::SharedStorageModifierMethodPtr method,
+                           auction_worklet::mojom::AuctionWorkletFunction
+                               source_auction_worklet_function) override;
 
  private:
   struct ReceiverContext;

content/services/auction_worklet/bidder_worklet_unittest.cc

@@ -61,6 +61,7 @@
 #include "third_party/blink/public/common/interest_group/ad_display_size.h"
 #include "third_party/blink/public/common/interest_group/interest_group.h"
 #include "third_party/blink/public/mojom/interest_group/interest_group_types.mojom.h"
+#include "third_party/blink/public/mojom/shared_storage/shared_storage.mojom.h"
 #include "third_party/googletest/src/googlemock/include/gmock/gmock-more-matchers.h"
 #include "url/gurl.h"
 #include "url/origin.h"
@@ -10611,43 +10612,32 @@ TEST_F(BidderWorkletSharedStorageAPIEnabledTest,
     // dedicated pipe.
     task_environment_.RunUntilIdle();
 
-    using RequestType =
-        auction_worklet::TestAuctionSharedStorageHost::RequestType;
     using Request = auction_worklet::TestAuctionSharedStorageHost::Request;
 
     EXPECT_THAT(
         test_shared_storage_host.observed_requests(),
         testing::ElementsAre(
-            Request{.type = RequestType::kSet,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderGenerateBid},
-            Request{.type = RequestType::kSet,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = true,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderGenerateBid},
-            Request{.type = RequestType::kAppend,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderGenerateBid},
-            Request{.type = RequestType::kDelete,
-                    .key = u"a",
-                    .value = std::u16string(),
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderGenerateBid},
-            Request{.type = RequestType::kClear,
-                    .key = std::u16string(),
-                    .value = std::u16string(),
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderGenerateBid}));
+            Request(blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                        blink::mojom::SharedStorageSetMethod::New(
+                            /*key=*/u"a", /*value=*/u"b",
+                            /*ignore_if_present=*/false)),
+                    mojom::AuctionWorkletFunction::kBidderGenerateBid),
+            Request(blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                        blink::mojom::SharedStorageSetMethod::New(
+                            /*key=*/u"a", /*value=*/u"b",
+                            /*ignore_if_present=*/true)),
+                    mojom::AuctionWorkletFunction::kBidderGenerateBid),
+            Request(blink::mojom::SharedStorageModifierMethod::NewAppendMethod(
+                        blink::mojom::SharedStorageAppendMethod::New(
+                            /*key=*/u"a", /*value=*/u"b")),
+                    mojom::AuctionWorkletFunction::kBidderGenerateBid),
+            Request(
+                blink::mojom::SharedStorageModifierMethod::NewDeleteMethod(
+                    blink::mojom::SharedStorageDeleteMethod::New(/*key=*/u"a")),
+                mojom::AuctionWorkletFunction::kBidderGenerateBid),
+            Request(blink::mojom::SharedStorageModifierMethod::NewClearMethod(
+                        blink::mojom::SharedStorageClearMethod::New()),
+                    mojom::AuctionWorkletFunction::kBidderGenerateBid)));
   }
 
   {
@@ -10710,43 +10700,32 @@ TEST_F(BidderWorkletSharedStorageAPIEnabledTest,
     // dedicated pipe.
     task_environment_.RunUntilIdle();
 
-    using RequestType =
-        auction_worklet::TestAuctionSharedStorageHost::RequestType;
     using Request = auction_worklet::TestAuctionSharedStorageHost::Request;
 
     EXPECT_THAT(
         test_shared_storage_host.observed_requests(),
         testing::ElementsAre(
-            Request{.type = RequestType::kSet,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderReportWin},
-            Request{.type = RequestType::kSet,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = true,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderReportWin},
-            Request{.type = RequestType::kAppend,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderReportWin},
-            Request{.type = RequestType::kDelete,
-                    .key = u"a",
-                    .value = std::u16string(),
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderReportWin},
-            Request{.type = RequestType::kClear,
-                    .key = std::u16string(),
-                    .value = std::u16string(),
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderReportWin}));
+            Request(blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                        blink::mojom::SharedStorageSetMethod::New(
+                            /*key=*/u"a", /*value=*/u"b",
+                            /*ignore_if_present=*/false)),
+                    mojom::AuctionWorkletFunction::kBidderReportWin),
+            Request(blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                        blink::mojom::SharedStorageSetMethod::New(
+                            /*key=*/u"a", /*value=*/u"b",
+                            /*ignore_if_present=*/true)),
+                    mojom::AuctionWorkletFunction::kBidderReportWin),
+            Request(blink::mojom::SharedStorageModifierMethod::NewAppendMethod(
+                        blink::mojom::SharedStorageAppendMethod::New(
+                            /*key=*/u"a", /*value=*/u"b")),
+                    mojom::AuctionWorkletFunction::kBidderReportWin),
+            Request(
+                blink::mojom::SharedStorageModifierMethod::NewDeleteMethod(
+                    blink::mojom::SharedStorageDeleteMethod::New(/*key=*/u"a")),
+                mojom::AuctionWorkletFunction::kBidderReportWin),
+            Request(blink::mojom::SharedStorageModifierMethod::NewClearMethod(
+                        blink::mojom::SharedStorageClearMethod::New()),
+                    mojom::AuctionWorkletFunction::kBidderReportWin)));
   }
 
   {
@@ -10851,18 +10830,16 @@ TEST_F(BidderWorkletTwoThreadsSharedStorageAPIEnabledTest,
   // handling the GenerateBid has observed the requests.
   EXPECT_TRUE(test_shared_storage_host1.observed_requests().empty());
 
-  using RequestType =
-      auction_worklet::TestAuctionSharedStorageHost::RequestType;
   using Request = auction_worklet::TestAuctionSharedStorageHost::Request;
 
   EXPECT_THAT(test_shared_storage_host0.observed_requests(),
-              testing::ElementsAre(Request{
-                  .type = RequestType::kSet,
-                  .key = u"a",
-                  .value = u"b",
-                  .ignore_if_present = false,
-                  .source_auction_worklet_function =
-                      mojom::AuctionWorkletFunction::kBidderGenerateBid}));
+              testing::ElementsAre(Request(
+                  blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                      blink::mojom::SharedStorageSetMethod::New(
+                          /*key=*/u"a", /*value=*/u"b",
+                          /*ignore_if_present=*/false)),
+
+                  mojom::AuctionWorkletFunction::kBidderGenerateBid)));
 }
 
 class BidderWorkletPrivateAggregationEnabledTest : public BidderWorkletTest {

content/services/auction_worklet/context_recycler_unittest.cc

@@ -41,6 +41,7 @@
 #include "third_party/blink/public/common/interest_group/interest_group.h"
 #include "third_party/blink/public/mojom/aggregation_service/aggregatable_report.mojom.h"
 #include "third_party/blink/public/mojom/private_aggregation/private_aggregation_host.mojom-forward.h"
+#include "third_party/blink/public/mojom/shared_storage/shared_storage.mojom.h"
 #include "v8/include/v8-context.h"
 #include "v8/include/v8-primitive.h"
 
@@ -2134,8 +2135,6 @@ TEST_F(ContextRecyclerTest,
 }
 
 TEST_F(ContextRecyclerTest, SharedStorageMethods) {
-  using RequestType =
-      auction_worklet::TestAuctionSharedStorageHost::RequestType;
   using Request = auction_worklet::TestAuctionSharedStorageHost::Request;
 
   const std::string kInvalidValue(
@@ -2192,13 +2191,12 @@ TEST_F(ContextRecyclerTest, SharedStorageMethods) {
     EXPECT_THAT(error_msgs, ElementsAre());
 
     EXPECT_THAT(test_shared_storage_host.observed_requests(),
-                ElementsAre(Request{
-                    .type = RequestType::kSet,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderGenerateBid}));
+                ElementsAre(Request(
+                    blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                        blink::mojom::SharedStorageSetMethod::New(
+                            /*key=*/u"a", /*value=*/u"b",
+                            /*ignore_if_present=*/false)),
+                    mojom::AuctionWorkletFunction::kBidderGenerateBid)));
 
     test_shared_storage_host.ClearObservedRequests();
   }
@@ -2221,13 +2219,12 @@ TEST_F(ContextRecyclerTest, SharedStorageMethods) {
     EXPECT_THAT(error_msgs, ElementsAre());
 
     EXPECT_THAT(test_shared_storage_host.observed_requests(),
-                ElementsAre(Request{
-                    .type = RequestType::kSet,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = true,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderGenerateBid}));
+                ElementsAre(Request(
+                    blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                        blink::mojom::SharedStorageSetMethod::New(
+                            /*key=*/u"a", /*value=*/u"b",
+                            /*ignore_if_present=*/true)),
+                    mojom::AuctionWorkletFunction::kBidderGenerateBid)));
 
     test_shared_storage_host.ClearObservedRequests();
   }
@@ -2245,13 +2242,11 @@ TEST_F(ContextRecyclerTest, SharedStorageMethods) {
     EXPECT_THAT(error_msgs, ElementsAre());
 
     EXPECT_THAT(test_shared_storage_host.observed_requests(),
-                ElementsAre(Request{
-                    .type = RequestType::kAppend,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderGenerateBid}));
+                ElementsAre(Request(
+                    blink::mojom::SharedStorageModifierMethod::NewAppendMethod(
+                        blink::mojom::SharedStorageAppendMethod::New(
+                            /*key=*/u"a", /*value=*/u"b")),
+                    mojom::AuctionWorkletFunction::kBidderGenerateBid)));
 
     test_shared_storage_host.ClearObservedRequests();
   }
@@ -2268,13 +2263,11 @@ TEST_F(ContextRecyclerTest, SharedStorageMethods) {
     EXPECT_THAT(error_msgs, ElementsAre());
 
     EXPECT_THAT(test_shared_storage_host.observed_requests(),
-                ElementsAre(Request{
-                    .type = RequestType::kDelete,
-                    .key = u"a",
-                    .value = std::u16string(),
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderGenerateBid}));
+                ElementsAre(Request(
+                    blink::mojom::SharedStorageModifierMethod::NewDeleteMethod(
+                        blink::mojom::SharedStorageDeleteMethod::New(
+                            /*key=*/u"a")),
+                    mojom::AuctionWorkletFunction::kBidderGenerateBid)));
 
     test_shared_storage_host.ClearObservedRequests();
   }
@@ -2291,13 +2284,10 @@ TEST_F(ContextRecyclerTest, SharedStorageMethods) {
     EXPECT_THAT(error_msgs, ElementsAre());
 
     EXPECT_THAT(test_shared_storage_host.observed_requests(),
-                ElementsAre(Request{
-                    .type = RequestType::kClear,
-                    .key = std::u16string(),
-                    .value = std::u16string(),
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kBidderGenerateBid}));
+                ElementsAre(Request(
+                    blink::mojom::SharedStorageModifierMethod::NewClearMethod(
+                        blink::mojom::SharedStorageClearMethod::New()),
+                    mojom::AuctionWorkletFunction::kBidderGenerateBid)));
 
     test_shared_storage_host.ClearObservedRequests();
   }

content/services/auction_worklet/public/cpp/auction_downloader_unittest.cc

@@ -13,6 +13,7 @@
 
 #include "base/functional/bind.h"
 #include "base/run_loop.h"
+#include "base/strings/stringprintf.h"
 #include "base/test/bind.h"
 #include "base/test/task_environment.h"
 #include "content/services/auction_worklet/worklet_test_util.h"

content/services/auction_worklet/public/mojom/auction_shared_storage_host.mojom

@@ -18,24 +18,7 @@ enum AuctionWorkletFunction {
 // storage API (i.e. the setter methods). We intentionally do not return the
 // result of these calls to avoid leaking state to the worklet.
 interface AuctionSharedStorageHost {
-  // Handle sharedStorage.set(): set `key`’s entry to `value`. If
-  // `ignore_if_present` is true, the entry is not updated if `key` already
-  // exists.
-  Set(blink.mojom.SharedStorageKeyArgument key,
-      blink.mojom.SharedStorageValueArgument value,
-      bool ignore_if_present,
-      AuctionWorkletFunction source_auction_worklet_function);
-
-  // Handle sharedStorage.append(): append `value` to the entry for `key`.
-  // Equivalent to "set" if the `key` is not present.
-  Append(blink.mojom.SharedStorageKeyArgument key,
-         blink.mojom.SharedStorageValueArgument value,
-         AuctionWorkletFunction source_auction_worklet_function);
-
-  // Handle sharedStorage.delete(): delete the entry at the given `key`.
-  Delete(blink.mojom.SharedStorageKeyArgument key,
-         AuctionWorkletFunction source_auction_worklet_function);
-
-  // Handle sharedStorage.clear(): delete all entries.
-  Clear(AuctionWorkletFunction source_auction_worklet_function);
+  // Handle the modifier method `method`.
+  SharedStorageUpdate(blink.mojom.SharedStorageModifierMethod method,
+                      AuctionWorkletFunction source_auction_worklet_function);
 };

content/services/auction_worklet/seller_worklet_unittest.cc

@@ -57,6 +57,7 @@
 #include "third_party/blink/public/common/interest_group/ad_display_size.h"
 #include "third_party/blink/public/common/interest_group/auction_config.h"
 #include "third_party/blink/public/mojom/interest_group/interest_group_types.mojom.h"
+#include "third_party/blink/public/mojom/shared_storage/shared_storage.mojom.h"
 #include "url/gurl.h"
 #include "url/origin.h"
 
@@ -5976,43 +5977,32 @@ TEST_F(SellerWorkletSharedStorageAPIEnabledTest, SharedStorageWriteInScoreAd) {
     // dedicated pipe.
     task_environment_.RunUntilIdle();
 
-    using RequestType =
-        auction_worklet::TestAuctionSharedStorageHost::RequestType;
     using Request = auction_worklet::TestAuctionSharedStorageHost::Request;
 
     EXPECT_THAT(
         test_shared_storage_host.observed_requests(),
         testing::ElementsAre(
-            Request{.type = RequestType::kSet,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kSellerScoreAd},
-            Request{.type = RequestType::kSet,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = true,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kSellerScoreAd},
-            Request{.type = RequestType::kAppend,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kSellerScoreAd},
-            Request{.type = RequestType::kDelete,
-                    .key = u"a",
-                    .value = std::u16string(),
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kSellerScoreAd},
-            Request{.type = RequestType::kClear,
-                    .key = std::u16string(),
-                    .value = std::u16string(),
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kSellerScoreAd}));
+            Request(blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                        blink::mojom::SharedStorageSetMethod::New(
+                            /*key=*/u"a", /*value=*/u"b",
+                            /*ignore_if_present=*/false)),
+                    mojom::AuctionWorkletFunction::kSellerScoreAd),
+            Request(blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                        blink::mojom::SharedStorageSetMethod::New(
+                            /*key=*/u"a", /*value=*/u"b",
+                            /*ignore_if_present=*/true)),
+                    mojom::AuctionWorkletFunction::kSellerScoreAd),
+            Request(blink::mojom::SharedStorageModifierMethod::NewAppendMethod(
+                        blink::mojom::SharedStorageAppendMethod::New(
+                            /*key=*/u"a", /*value=*/u"b")),
+                    mojom::AuctionWorkletFunction::kSellerScoreAd),
+            Request(
+                blink::mojom::SharedStorageModifierMethod::NewDeleteMethod(
+                    blink::mojom::SharedStorageDeleteMethod::New(/*key=*/u"a")),
+                mojom::AuctionWorkletFunction::kSellerScoreAd),
+            Request(blink::mojom::SharedStorageModifierMethod::NewClearMethod(
+                        blink::mojom::SharedStorageClearMethod::New()),
+                    mojom::AuctionWorkletFunction::kSellerScoreAd)));
   }
 
   {
@@ -6073,43 +6063,32 @@ TEST_F(SellerWorkletSharedStorageAPIEnabledTest,
     // dedicated pipe.
     task_environment_.RunUntilIdle();
 
-    using RequestType =
-        auction_worklet::TestAuctionSharedStorageHost::RequestType;
     using Request = auction_worklet::TestAuctionSharedStorageHost::Request;
 
     EXPECT_THAT(
         test_shared_storage_host.observed_requests(),
         testing::ElementsAre(
-            Request{.type = RequestType::kSet,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kSellerReportResult},
-            Request{.type = RequestType::kSet,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = true,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kSellerReportResult},
-            Request{.type = RequestType::kAppend,
-                    .key = u"a",
-                    .value = u"b",
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kSellerReportResult},
-            Request{.type = RequestType::kDelete,
-                    .key = u"a",
-                    .value = std::u16string(),
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kSellerReportResult},
-            Request{.type = RequestType::kClear,
-                    .key = std::u16string(),
-                    .value = std::u16string(),
-                    .ignore_if_present = false,
-                    .source_auction_worklet_function =
-                        mojom::AuctionWorkletFunction::kSellerReportResult}));
+            Request(blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                        blink::mojom::SharedStorageSetMethod::New(
+                            /*key=*/u"a", /*value=*/u"b",
+                            /*ignore_if_present=*/false)),
+                    mojom::AuctionWorkletFunction::kSellerReportResult),
+            Request(blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                        blink::mojom::SharedStorageSetMethod::New(
+                            /*key=*/u"a", /*value=*/u"b",
+                            /*ignore_if_present=*/true)),
+                    mojom::AuctionWorkletFunction::kSellerReportResult),
+            Request(blink::mojom::SharedStorageModifierMethod::NewAppendMethod(
+                        blink::mojom::SharedStorageAppendMethod::New(
+                            /*key=*/u"a", /*value=*/u"b")),
+                    mojom::AuctionWorkletFunction::kSellerReportResult),
+            Request(
+                blink::mojom::SharedStorageModifierMethod::NewDeleteMethod(
+                    blink::mojom::SharedStorageDeleteMethod::New(/*key=*/u"a")),
+                mojom::AuctionWorkletFunction::kSellerReportResult),
+            Request(blink::mojom::SharedStorageModifierMethod::NewClearMethod(
+                        blink::mojom::SharedStorageClearMethod::New()),
+                    mojom::AuctionWorkletFunction::kSellerReportResult)));
   }
 
   {
@@ -6343,18 +6322,15 @@ TEST_F(SellerWorkletTwoThreadsSharedStorageAPIEnabledTest,
   // handling the ScoreAd has observed the requests.
   EXPECT_TRUE(test_shared_storage_host1.observed_requests().empty());
 
-  using RequestType =
-      auction_worklet::TestAuctionSharedStorageHost::RequestType;
   using Request = auction_worklet::TestAuctionSharedStorageHost::Request;
 
   EXPECT_THAT(test_shared_storage_host0.observed_requests(),
-              testing::ElementsAre(
-                  Request{.type = RequestType::kSet,
-                          .key = u"a",
-                          .value = u"b",
-                          .ignore_if_present = false,
-                          .source_auction_worklet_function =
-                              mojom::AuctionWorkletFunction::kSellerScoreAd}));
+              testing::ElementsAre(Request(
+                  blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+                      blink::mojom::SharedStorageSetMethod::New(
+                          /*key=*/u"a", /*value=*/u"b",
+                          /*ignore_if_present=*/false)),
+                  mojom::AuctionWorkletFunction::kSellerScoreAd)));
 }
 
 class SellerWorkletRealTimeTest : public SellerWorkletTest {

content/services/auction_worklet/shared_storage_bindings.cc

@@ -14,6 +14,7 @@
 #include "content/services/auction_worklet/webidl_compat.h"
 #include "gin/converter.h"
 #include "third_party/blink/public/common/shared_storage/shared_storage_utils.h"
+#include "third_party/blink/public/mojom/shared_storage/shared_storage.mojom.h"
 #include "v8/include/v8-exception.h"
 #include "v8/include/v8-external.h"
 #include "v8/include/v8-function-callback.h"
@@ -142,9 +143,12 @@ void SharedStorageBindings::Set(
     return;
   }
 
-  bindings->shared_storage_host_->Set(
-      arg0_key, arg1_value, ignore_if_present.value_or(false),
-      bindings->source_auction_worklet_function_);
+  auto method = blink::mojom::SharedStorageModifierMethod::NewSetMethod(
+      blink::mojom::SharedStorageSetMethod::New(
+          arg0_key, arg1_value, ignore_if_present.value_or(false)));
+
+  bindings->shared_storage_host_->SharedStorageUpdate(
+      std::move(method), bindings->source_auction_worklet_function_);
 }
 
 // static
@@ -187,8 +191,11 @@ void SharedStorageBindings::Append(
     return;
   }
 
-  bindings->shared_storage_host_->Append(
-      arg0_key, arg1_value, bindings->source_auction_worklet_function_);
+  auto method = blink::mojom::SharedStorageModifierMethod::NewAppendMethod(
+      blink::mojom::SharedStorageAppendMethod::New(arg0_key, arg1_value));
+
+  bindings->shared_storage_host_->SharedStorageUpdate(
+      std::move(method), bindings->source_auction_worklet_function_);
 }
 
 // static
@@ -223,8 +230,11 @@ void SharedStorageBindings::Delete(
     return;
   }
 
-  bindings->shared_storage_host_->Delete(
-      arg0_key, bindings->source_auction_worklet_function_);
+  auto method = blink::mojom::SharedStorageModifierMethod::NewDeleteMethod(
+      blink::mojom::SharedStorageDeleteMethod::New(arg0_key));
+
+  bindings->shared_storage_host_->SharedStorageUpdate(
+      std::move(method), bindings->source_auction_worklet_function_);
 }
 
 // static
@@ -241,7 +251,10 @@ void SharedStorageBindings::Clear(
     return;
   }
 
-  bindings->shared_storage_host_->Clear(
-      bindings->source_auction_worklet_function_);
+  auto method = blink::mojom::SharedStorageModifierMethod::NewClearMethod(
+      blink::mojom::SharedStorageClearMethod::New());
+
+  bindings->shared_storage_host_->SharedStorageUpdate(
+      std::move(method), bindings->source_auction_worklet_function_);
 }
 }  // namespace auction_worklet

content/services/auction_worklet/worklet_test_util.cc

@@ -22,6 +22,7 @@
 #include "services/network/public/cpp/url_loader_completion_status.h"
 #include "services/network/public/mojom/url_response_head.mojom.h"
 #include "services/network/test/test_url_loader_factory.h"
+#include "third_party/blink/public/mojom/shared_storage/shared_storage.mojom.h"
 
 namespace auction_worklet {
 
@@ -137,10 +138,34 @@ base::WaitableEvent* WedgeV8Thread(AuctionV8Helper* v8_helper) {
   return event_handle;
 }
 
+TestAuctionSharedStorageHost::Request::Request(
+    blink::mojom::SharedStorageModifierMethodPtr method,
+    mojom::AuctionWorkletFunction source_auction_worklet_function)
+    : method(std::move(method)),
+      source_auction_worklet_function(source_auction_worklet_function) {}
+
+TestAuctionSharedStorageHost::Request::~Request() = default;
+
+TestAuctionSharedStorageHost::Request::Request(const Request& other)
+    : method(other.method->Clone()),
+      source_auction_worklet_function(other.source_auction_worklet_function) {}
+
+TestAuctionSharedStorageHost::Request&
+TestAuctionSharedStorageHost::Request::operator=(const Request& other) {
+  if (this != &other) {
+    method = other.method->Clone();
+    source_auction_worklet_function = other.source_auction_worklet_function;
+  }
+  return *this;
+}
+
+TestAuctionSharedStorageHost::Request::Request(Request&& other) = default;
+TestAuctionSharedStorageHost::Request&
+TestAuctionSharedStorageHost::Request::operator=(Request&& other) = default;
+
 bool TestAuctionSharedStorageHost::Request::operator==(
     const Request& rhs) const {
-  return type == rhs.type && key == rhs.key && value == rhs.value &&
-         ignore_if_present == rhs.ignore_if_present &&
+  return method == rhs.method &&
          source_auction_worklet_function == rhs.source_auction_worklet_function;
 }
 
@@ -148,50 +173,12 @@ TestAuctionSharedStorageHost::TestAuctionSharedStorageHost() = default;
 
 TestAuctionSharedStorageHost::~TestAuctionSharedStorageHost() = default;
 
-void TestAuctionSharedStorageHost::Set(
-    const std::u16string& key,
-    const std::u16string& value,
-    bool ignore_if_present,
-    mojom::AuctionWorkletFunction source_auction_worklet_function) {
-  observed_requests_.emplace_back(Request{
-      .type = RequestType::kSet,
-      .key = key,
-      .value = value,
-      .ignore_if_present = ignore_if_present,
-      .source_auction_worklet_function = source_auction_worklet_function});
-}
-
-void TestAuctionSharedStorageHost::Append(
-    const std::u16string& key,
-    const std::u16string& value,
-    mojom::AuctionWorkletFunction source_auction_worklet_function) {
-  observed_requests_.emplace_back(Request{
-      .type = RequestType::kAppend,
-      .key = key,
-      .value = value,
-      .ignore_if_present = false,
-      .source_auction_worklet_function = source_auction_worklet_function});
-}
-
-void TestAuctionSharedStorageHost::Delete(
-    const std::u16string& key,
-    mojom::AuctionWorkletFunction source_auction_worklet_function) {
-  observed_requests_.emplace_back(Request{
-      .type = RequestType::kDelete,
-      .key = key,
-      .value = std::u16string(),
-      .ignore_if_present = false,
-      .source_auction_worklet_function = source_auction_worklet_function});
-}
-
-void TestAuctionSharedStorageHost::Clear(
-    mojom::AuctionWorkletFunction source_auction_worklet_function) {
-  observed_requests_.emplace_back(Request{
-      .type = RequestType::kClear,
-      .key = std::u16string(),
-      .value = std::u16string(),
-      .ignore_if_present = false,
-      .source_auction_worklet_function = source_auction_worklet_function});
+void TestAuctionSharedStorageHost::SharedStorageUpdate(
+    blink::mojom::SharedStorageModifierMethodPtr method,
+    auction_worklet::mojom::AuctionWorkletFunction
+        source_auction_worklet_function) {
+  observed_requests_.emplace_back(
+      Request(std::move(method), source_auction_worklet_function));
 }
 
 void TestAuctionSharedStorageHost::ClearObservedRequests() {

content/services/auction_worklet/worklet_test_util.h

@@ -80,18 +80,17 @@ base::WaitableEvent* WedgeV8Thread(AuctionV8Helper* v8_helper);
 // Receives shared storage mojom messages.
 class TestAuctionSharedStorageHost : public mojom::AuctionSharedStorageHost {
  public:
-  enum RequestType {
-    kSet,
-    kAppend,
-    kDelete,
-    kClear,
-  };
-
   struct Request {
-    RequestType type;
-    std::u16string key;
-    std::u16string value;
-    bool ignore_if_present;
+    Request(blink::mojom::SharedStorageModifierMethodPtr method,
+            mojom::AuctionWorkletFunction source_auction_worklet_function);
+    ~Request();
+
+    Request(const Request& other);
+    Request& operator=(const Request& other);
+    Request(Request&& other);
+    Request& operator=(Request&& other);
+
+    blink::mojom::SharedStorageModifierMethodPtr method;
     mojom::AuctionWorkletFunction source_auction_worklet_function;
 
     bool operator==(const Request& rhs) const;
@@ -102,23 +101,9 @@ class TestAuctionSharedStorageHost : public mojom::AuctionSharedStorageHost {
   ~TestAuctionSharedStorageHost() override;
 
   // mojom::AuctionSharedStorageHost:
-  void Set(
-      const std::u16string& key,
-      const std::u16string& value,
-      bool ignore_if_present,
-      mojom::AuctionWorkletFunction source_auction_worklet_function) override;
-
-  void Append(
-      const std::u16string& key,
-      const std::u16string& value,
-      mojom::AuctionWorkletFunction source_auction_worklet_function) override;
-
-  void Delete(
-      const std::u16string& key,
-      mojom::AuctionWorkletFunction source_auction_worklet_function) override;
-
-  void Clear(
-      mojom::AuctionWorkletFunction source_auction_worklet_function) override;
+  void SharedStorageUpdate(blink::mojom::SharedStorageModifierMethodPtr method,
+                           auction_worklet::mojom::AuctionWorkletFunction
+                               source_auction_worklet_function) override;
 
   const std::vector<Request>& observed_requests() const {
     return observed_requests_;