Add blink-side binding code and tests for ServiceWorker -> Document postMessage (3/3)

Source/modules/serviceworkers/ServiceWorkerGlobalScopeClient.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ServiceWorkerGlobalScopeClient_h
 #define ServiceWorkerGlobalScopeClient_h
 
+#include "core/dom/MessagePort.h"
 #include "core/workers/WorkerClients.h"
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/WebServiceWorkerClientsInfo.h"
 #include "public/platform/WebServiceWorkerEventResult.h"
 #include "wtf/Forward.h"
 #include "wtf/Noncopyable.h"
 
 namespace blink {
 class WebURL;
 };
@@ skipping 10 matching lines @@
     virtual ~ServiceWorkerGlobalScopeClient() { }
 
     virtual void getClients(blink::WebServiceWorkerClientsCallbacks*) = 0;
     virtual blink::WebURL scope() const = 0;
 
     virtual void didHandleActivateEvent(int eventID, blink::WebServiceWorkerEventResult) = 0;
     virtual void didHandleInstallEvent(int installEventID, blink::WebServiceWorkerEventResult) = 0;
     // A null response means no valid response was provided by the service worker, so fallback to native.
     virtual void didHandleFetchEvent(int fetchEventID, PassRefPtr<Response> = nullptr) = 0;
     virtual void didHandleSyncEvent(int syncEventID) = 0;
+    virtual void postMessageToClient(int clientID, PassRefPtr<SerializedScriptValue> message, PassOwnPtr<MessagePortChannelArray>) = 0;
 
     static const char* supplementName();
     static ServiceWorkerGlobalScopeClient* from(ExecutionContext*);
 
 protected:
     ServiceWorkerGlobalScopeClient() { }
 };
 
 void provideServiceWorkerGlobalScopeClientToWorker(WorkerClients*, PassOwnPtrWillBeRawPtr<ServiceWorkerGlobalScopeClient>);
 
 } // namespace WebCore
 
 #endif // ServiceWorkerGlobalScopeClient_h