ServiceWorker: Show a warning when ServiceWorker(Client) attempts to send a transferable ArrayBuffer

Source/modules/serviceworkers/ServiceWorkerClient.cpp

Index: Source/modules/serviceworkers/ServiceWorkerClient.cpp
diff --git a/Source/modules/serviceworkers/ServiceWorkerClient.cpp b/Source/modules/serviceworkers/ServiceWorkerClient.cpp
index 4aed29c2d162aa2de61fc51c72f5742d98bbf74c..c43de5cc25987dafabb099677dc1a9fdc3e7322a 100644
--- a/Source/modules/serviceworkers/ServiceWorkerClient.cpp
+++ b/Source/modules/serviceworkers/ServiceWorkerClient.cpp
@@ -8,6 +8,7 @@
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/SerializedScriptValue.h"
+#include "core/inspector/ConsoleMessage.h"
 #include "modules/serviceworkers/ServiceWorkerGlobalScopeClient.h"
 #include "public/platform/WebString.h"
 #include "wtf/RefPtr.h"
@@ -54,6 +55,9 @@ void ServiceWorkerClient::postMessage(ExecutionContext* context, PassRefPtr<Seri
     if (exceptionState.hadException())
         return;
 
+    if (message->containsTransferableArrayBuffer())
+        context->addConsoleMessage(ConsoleMessage::create(JSMessageSource, WarningMessageLevel, "ServiceWorkerClient cannot send an ArrayBuffer as a transferable object yet. See http://crbug.com/511119"));
+
     WebString messageString = message->toWireString();
     OwnPtr<WebMessagePortChannelArray> webChannels = MessagePort::toWebMessagePortChannelArray(channels.release());
     ServiceWorkerGlobalScopeClient::from(context)->postMessageToClient(m_uuid, messageString, webChannels.release());