[PA] Move README, OWNERS, DEPS, BUILD.gn to top-level dir.

This is a follow-up to:
https://chromium-review.googlesource.com/c/chromium/src/+/4812338

The previous patch moved the whole PA directory into
"src/partition_alloc" without putting much thinking about individual
files.

This follow-up moves the README, OWNERS, DEPS, BUILD.gn file into the
top-level directory.

Bug: chromium:1467773
Change-Id: Ie9f457fe957bbf27779892eece606eb220d50cb4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4934632
Owners-Override: danakj <danakj@chromium.org>
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Takashi Sakamoto <tasak@google.com>
Reviewed-by: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1210356}

base/BUILD.gn

@@ -18,8 +18,7 @@
 # huge sequence of random-looking conditionals.
 
 import("//base/allocator/allocator.gni")
-import(
-    "//base/allocator/partition_allocator/src/partition_alloc/partition_alloc.gni")
+import("//base/allocator/partition_allocator/partition_alloc.gni")
 import("//base/debug/debug.gni")
 import("//base/trace_event/tracing.gni")
 import("//build/buildflag_header.gni")
@@ -1040,7 +1039,7 @@ component("base") {
   deps = [
     ":message_pump_buildflags",
     "//base/allocator:buildflags",
-    "//base/allocator/partition_allocator/src/partition_alloc:raw_ptr",
+    "//base/allocator/partition_allocator:raw_ptr",
     "//base/third_party/double_conversion",
     "//base/third_party/dynamic_annotations",
     "//build:blink_buildflags",
@@ -1079,8 +1078,8 @@ component("base") {
     ":sanitizer_buildflags",
     ":synchronization_buildflags",
     ":tracing_buildflags",
-    "//base/allocator/partition_allocator/src/partition_alloc:buildflags",
-    "//base/allocator/partition_allocator/src/partition_alloc:raw_ptr",
+    "//base/allocator/partition_allocator:buildflags",
+    "//base/allocator/partition_allocator:raw_ptr",
     "//base/numerics:base_numerics",
     "//build:chromecast_buildflags",
     "//build:chromeos_buildflags",
@@ -1707,8 +1706,8 @@ component("base") {
     # partition_alloc code if use_partition_alloc = false because no code uses
     # partition_alloc.
     public_deps += [
-      "allocator/partition_allocator/src/partition_alloc",
-      "allocator/partition_allocator/src/partition_alloc:raw_ptr",
+      "allocator/partition_allocator:partition_alloc",
+      "allocator/partition_allocator:raw_ptr",
     ]
   }
 
@@ -5073,7 +5072,7 @@ source_set("partition_alloc_test_support") {
     sources += [ "allocator/partition_allocator/src/partition_alloc/partition_alloc_base/threading/platform_thread_android_for_testing.cc" ]
   }
   public_deps = [
-    "allocator/partition_allocator/src/partition_alloc:buildflags",
+    "allocator/partition_allocator:buildflags",
     "//build:branding_buildflags",
     "//build/config/compiler:compiler_buildflags",
   ]

base/allocator/BUILD.gn

@@ -3,8 +3,7 @@
 # found in the LICENSE file.
 
 import("//base/allocator/allocator.gni")
-import(
-    "//base/allocator/partition_allocator/src/partition_alloc/partition_alloc.gni")
+import("//base/allocator/partition_allocator/partition_alloc.gni")
 import("//build/buildflag_header.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/dcheck_always_on.gni")
@@ -26,7 +25,7 @@ if (is_apple) {
 
     deps = [
       ":buildflags",
-      "//base/allocator/partition_allocator/src/partition_alloc:buildflags",
+      "//base/allocator/partition_allocator:buildflags",
     ]
   }
 }

base/allocator/OWNERS

@@ -2,6 +2,6 @@ lizeb@chromium.org
 primiano@chromium.org
 wfh@chromium.org
 
-per-file allocator.gni=file://base/allocator/partition_allocator/src/partition_alloc/OWNERS
-per-file partition_alloc*=file://base/allocator/partition_allocator/src/partition_alloc/OWNERS
-per-file BUILD.gn=file://base/allocator/partition_allocator/src/partition_alloc/OWNERS
+per-file allocator.gni=file://base/allocator/partition_allocator/OWNERS
+per-file partition_alloc*=file://base/allocator/partition_allocator/OWNERS
+per-file BUILD.gn=file://base/allocator/partition_allocator/OWNERS

base/allocator/allocator.gni

@@ -2,8 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import(
-    "//base/allocator/partition_allocator/src/partition_alloc/partition_alloc.gni")
+import("//base/allocator/partition_allocator/partition_alloc.gni")
 
 # Chromium-specific asserts. External embedders _may_ elect to use these
 # features even without PA-E.

base/allocator/partition_allocator/BUILD.gn

@@ -0,0 +1,15 @@
+# Copyright 2024 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+group("raw_ptr") {
+  public_deps = [ "src/partition_alloc:raw_ptr" ]
+}
+
+group("partition_alloc") {
+  public_deps = [ "src/partition_alloc:partition_alloc" ]
+}
+
+group("buildflags") {
+  public_deps = [ "src/partition_alloc:buildflags" ]
+}

base/allocator/partition_allocator/build_config.md

@@ -8,7 +8,7 @@ different settings. Broadly, these are controlled at the top-level by
 *** promo
 Most of what you'll want to know exists between
 
-* [`//base/allocator/partition_allocator/src/partition_alloc/BUILD.gn`][pa-build-gn],
+* [`//base/allocator/partition_allocator/BUILD.gn`][pa-build-gn],
 * Everything else ending in `.gn` or `.gni` in
   `//base/allocator/partition_allocator/src/partition_alloc/`,
 * [`allocator.gni`][allocator-gni],
@@ -93,7 +93,7 @@ that influence PartitionAlloc's behavior.
 
 [gn-declare-args]: https://gn.googlesource.com/gn/+/refs/heads/main/docs/reference.md#func_declare_args
 [buildflag-header]: https://source.chromium.org/chromium/chromium/src/+/main:build/buildflag_header.gni
-[pa-build-gn]: https://source.chromium.org/chromium/chromium/src/+/main:base/allocator/partition_allocator/src/partition_alloc/BUILD.gn
+[pa-build-gn]: https://source.chromium.org/chromium/chromium/src/+/main:base/allocator/partition_allocator/BUILD.gn
 [allocator-gni]: https://source.chromium.org/chromium/chromium/src/+/main:base/allocator/allocator.gni
 [base-allocator-build-gn]: https://source.chromium.org/chromium/chromium/src/+/main:base/allocator/BUILD.gn
 [base-build-gn]: https://source.chromium.org/chromium/chromium/src/+/main:base/BUILD.gn

base/allocator/partition_allocator/src/partition_alloc/BUILD.gn

@@ -2,8 +2,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import(
-    "//base/allocator/partition_allocator/src/partition_alloc/partition_alloc.gni")
 import("//build/buildflag_header.gni")
 import("//build/config/android/config.gni")
 import("//build/config/chromecast_build.gni")
@@ -11,6 +9,7 @@ import("//build/config/chromeos/ui_mode.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/logging.gni")
+import("../../partition_alloc.gni")
 
 # Add partition_alloc.gni and import it for partition_alloc configs.
 

base/allocator/partition_allocator/src/partition_alloc/encoded_next_freelist.h

@@ -74,7 +74,7 @@ class EncodedFreelistPtr {
 };
 
 // Freelist entries are encoded for security reasons. See
-// //base/allocator/partition_allocator/src/partition_alloc/PartitionAlloc.md
+// //base/allocator/partition_allocator/PartitionAlloc.md
 // and |Transform()| for the rationale and mechanism, respectively.
 class EncodedNextFreelistEntry {
  private:

build_overrides/OWNERS

@@ -3,4 +3,4 @@ file://build/OWNERS
 machenbach@chromium.org
 mbonadei@chromium.org
 
-per-file partition_alloc.*=file://base/allocator/partition_allocator/src/partition_alloc/OWNERS
+per-file partition_alloc.*=file://base/allocator/partition_allocator/OWNERS

build_overrides/partition_alloc.gni

@@ -5,7 +5,7 @@
 # This defines PartitionAlloc's default build configuration for chromium.
 # If building PartitionAlloc as a part of chromium,
 # //build_overrides/partition_alloc.gni points out this file.
-# //base/allocator/partition_allocator/src/partition_alloc/partition_alloc.gni will import
+# //base/allocator/partition_allocator/partition_alloc.gni will import
 # this file and will use the defined values as default build configuration.
 #
 # partition_alloc.gni declares the following variables:

build_overrides/pdfium.gni

@@ -2,8 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import(
-    "//base/allocator/partition_allocator/src/partition_alloc/partition_alloc.gni")
+import("//base/allocator/partition_allocator/partition_alloc.gni")
 
 # Enable use of Javascript in PDFs.
 pdf_enable_v8_override = true

components/cronet/android/dependencies.txt

@@ -1,5 +1,6 @@
 //base
 //base/allocator
+//base/allocator/partition_allocator
 //base/allocator/partition_allocator/src/partition_alloc
 //base/android/jni_generator
 //base/numerics

components/gwp_asan/buildflags/buildflags.gni

@@ -3,8 +3,7 @@
 # found in the LICENSE file.
 
 import("//base/allocator/allocator.gni")
-import(
-    "//base/allocator/partition_allocator/src/partition_alloc/partition_alloc.gni")
+import("//base/allocator/partition_allocator/partition_alloc.gni")
 import("//build/config/compiler/compiler.gni")
 
 # Windows/32-bit is disabled due to https://crbug.com/969146

components/gwp_asan/client/BUILD.gn

@@ -3,8 +3,7 @@
 # found in the LICENSE file.
 
 import("//base/allocator/allocator.gni")
-import(
-    "//base/allocator/partition_allocator/src/partition_alloc/partition_alloc.gni")
+import("//base/allocator/partition_allocator/partition_alloc.gni")
 
 config("gwp_asan_implementation") {
   defines = [ "GWP_ASAN_IMPLEMENTATION" ]

content/browser/BUILD.gn

@@ -2,8 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import(
-    "//base/allocator/partition_allocator/src/partition_alloc/partition_alloc.gni")
+import("//base/allocator/partition_allocator/partition_alloc.gni")
 import("//build/buildflag_header.gni")
 import("//build/config/chromeos/ui_mode.gni")
 import("//build/config/chromeos/ui_mode.gni")

docs/memory-infra/README.md

@@ -95,7 +95,7 @@ and it is discounted from malloc and the blue columns.
 [discardable]:base/memory/discardable_memory.h
 [cc-memory]:  probe-cc.md
 [gpu-memory]: probe-gpu.md
-[partalloc]:  /base/allocator/partition_allocator/src/partition_alloc/PartitionAlloc.md
+[partalloc]:  /base/allocator/partition_allocator/PartitionAlloc.md
 
 ## 'effective\_size' vs. 'size'
 

gin/BUILD.gn

@@ -5,8 +5,7 @@
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
-import(
-    "//base/allocator/partition_allocator/src/partition_alloc/partition_alloc.gni")
+import("//base/allocator/partition_allocator/partition_alloc.gni")
 import("//testing/test.gni")
 import("//tools/v8_context_snapshot/v8_context_snapshot.gni")
 import("//v8/gni/v8.gni")

gin/OWNERS

@@ -15,4 +15,4 @@ per-file thread_isolation.*=sroettger@google.com
 per-file v8_platform_thread_isolated_allocator.*=sroettger@google.com
 
 # For PartitionAlloc related changes.
-per-file array_buffer.cc=file://base/allocator/partition_allocator/src/partition_alloc/OWNERS
+per-file array_buffer.cc=file://base/allocator/partition_allocator/OWNERS

ios/chrome/app/chrome_app.gni

@@ -128,7 +128,7 @@ template("chrome_app") {
 
       deps = [
         "//base/allocator:early_zone_registration_apple",
-        "//base/allocator/partition_allocator/src/partition_alloc:partition_alloc_buildflags",
+        "//base/allocator/partition_allocator:buildflags",
         "//ios/chrome/app:chrome_main_module_buildflags",
       ]
 

third_party/blink/renderer/platform/wtf/Allocator.md

@@ -31,7 +31,7 @@ When you simply call `new` or `malloc` PartitionAlloc will be used, unless
 are specified.
 
 The implementation is in /base/allocator/partition_allocator.
-See [PartitionAlloc.md](/base/allocator/partition_allocator/src/partition_alloc/PartitionAlloc.md)
+See [PartitionAlloc.md](/base/allocator/partition_allocator/PartitionAlloc.md)
 to learn the design.
 
 #### `USING_FAST_MALLOC`

third_party/blink/renderer/platform/wtf/OWNERS

@@ -3,4 +3,4 @@ mlippautz@chromium.org
 thakis@chromium.org
 tkent@chromium.org
 
-per-file allocator/*=file://base/allocator/partition_allocator/src/partition_alloc/OWNERS
+per-file allocator/*=file://base/allocator/partition_allocator/OWNERS

tools/memory/partition_allocator/BUILD.gn

@@ -2,8 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import(
-    "//base/allocator/partition_allocator/src/partition_alloc/partition_alloc.gni")
+import("//base/allocator/partition_allocator/partition_alloc.gni")
 
 # Only support x86_64 Linux as the system calls used are Linux-specific. No
 # point in building this if PartitionAlloc is not the allocator used.

tools/memory/partition_allocator/OWNERS

@@ -1 +1 @@
-file://base/allocator/partition_allocator/src/partition_alloc/OWNERS
+file://base/allocator/partition_allocator/OWNERS