[wasm] Change WebAssembly flags option to only cover structured cloning.

content/child/runtime_features.cc

Index: content/child/runtime_features.cc
diff --git a/content/child/runtime_features.cc b/content/child/runtime_features.cc
index 1fcfb01642eee6d84748e2f6dee1c2f3a1a023cb..172c46552e9d3963346e8ed63a7db028b64112ac 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -100,9 +100,9 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
   if (!base::FeatureList::IsEnabled(features::kNotificationContentImage))
     WebRuntimeFeatures::enableNotificationContentImage(false);
 
-  // For the time being, enable wasm serialization when wasm is enabled,
-  // since the whole wasm space is experimental. We have the flexibility
-  // to decouple the two.
+  // For the time being, wasm serialization is separately controlled
+  // by this flag. WebAssembly APIs and compilation is now enabled
+  // unconditionally in V8.
   if (base::FeatureList::IsEnabled(features::kWebAssembly))
     WebRuntimeFeatures::enableWebAssemblySerialization(true);