WebMessaging: Show a warning when MessagePort attempts to send a transferable ArrayBuffer

Source/bindings/core/v8/SerializedScriptValue.h

Index: Source/bindings/core/v8/SerializedScriptValue.h
diff --git a/Source/bindings/core/v8/SerializedScriptValue.h b/Source/bindings/core/v8/SerializedScriptValue.h
index 284cc924e04fc335af20ed48d33a7eb6eedae87f..77658e791ca7533c423bbe245392c66d65752c7f 100644
--- a/Source/bindings/core/v8/SerializedScriptValue.h
+++ b/Source/bindings/core/v8/SerializedScriptValue.h
@@ -97,6 +97,9 @@ public:
     // The memory registration is revoked automatically in destructor.
     void registerMemoryAllocatedWithCurrentScriptContext();
 
+    // Returns true if the value contains a transferable ArrayBuffer.
+    bool containsTransferableArrayBuffer() const;
+
 private:
     // The followings are private, but used by SerializedScriptValueFactory.
     enum StringDataMode {