ServiceWorker: Introduce ServiceWorkerMessageEvent to replace MessageEvent (3/3).

public/platform/WebServiceWorkerProviderClient.h

Index: public/platform/WebServiceWorkerProviderClient.h
diff --git a/public/platform/WebServiceWorkerProviderClient.h b/public/platform/WebServiceWorkerProviderClient.h
index cff4efa3687ef34c272a13c8b264bd2b8bfc57ef..b803d39962e355ca1de413ef824e235b752f0c46 100644
--- a/public/platform/WebServiceWorkerProviderClient.h
+++ b/public/platform/WebServiceWorkerProviderClient.h
@@ -47,12 +47,7 @@ public:
 
     virtual void setController(WebServiceWorker*, bool shouldNotifyControllerChange) = 0;
 
-    // FIXME: Remove this when Chrome side CL landed.
-    virtual void dispatchMessageEvent(const WebString& message, const WebMessagePortChannelArray&) = 0;
-    virtual void dispatchMessageEvent(WebServiceWorker*, const WebString& message, const WebMessagePortChannelArray& channels)
-    {
-        return dispatchMessageEvent(message, channels);
-    }
+    virtual void dispatchMessageEvent(WebServiceWorker*, const WebString& message, const WebMessagePortChannelArray& channels) = 0;
 };
 
 } // namespace blink