[v8][wasm] Add blink flag for the generic wasm-to-js wrapper

Change-Id: Idc3f10fb0ca07b3ee021a38908130bb4f97bfd6e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4905195
Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1205099}

gin/gin_features.cc

@@ -256,4 +256,8 @@ BASE_FEATURE(kWebAssemblyInlining,
              "WebAssemblyInlining",
              base::FEATURE_DISABLED_BY_DEFAULT);
 
+// Enable the generic wasm-to-js wrapper.
+BASE_FEATURE(kWebAssemblyGenericWrapper,
+             "WebAssemblyGenericWrapper",
+             base::FEATURE_DISABLED_BY_DEFAULT);
 }  // namespace features

gin/gin_features.h

@@ -69,6 +69,7 @@ GIN_EXPORT BASE_DECLARE_FEATURE(kJavaScriptIteratorHelpers);
 GIN_EXPORT BASE_DECLARE_FEATURE(kJavaScriptPromiseWithResolvers);
 GIN_EXPORT BASE_DECLARE_FEATURE(kWebAssemblyTailCall);
 GIN_EXPORT BASE_DECLARE_FEATURE(kWebAssemblyInlining);
+GIN_EXPORT BASE_DECLARE_FEATURE(kWebAssemblyGenericWrapper);
 
 }  // namespace features
 

gin/v8_initializer.cc

@@ -411,7 +411,9 @@ void SetFlags(IsolateHolder::ScriptMode mode,
   SetV8FlagsIfOverridden(features::kWebAssemblyInlining,
                          "--experimental-wasm-inlining",
                          "--no-experimental-wasm-inlining");
-
+  SetV8FlagsIfOverridden(features::kWebAssemblyGenericWrapper,
+                         "--wasm-to-js-generic-wrapper",
+                         "--no-wasm-to-js-generic-wrapper");
   if (js_command_line_flags.empty())
     return;