[wasm] Support wasm module 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 b29d7cd925dcc1ef12286a36c3bca7c571724ce1..7748255261ef09d604244a044c1ce2211657bd0a 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -85,6 +85,12 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
     WebRuntimeFeatures::enablePushMessaging(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.
+  if (command_line.HasSwitch(switches::kEnableWasm))
+    WebRuntimeFeatures::enableWebAssemblySerialization(true);
+
   if (command_line.HasSwitch(switches::kDisableSharedWorkers))
     WebRuntimeFeatures::enableSharedWorker(false);