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

Source/web/ServiceWorkerGlobalScopeClientImpl.cpp

Index: Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
diff --git a/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp b/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
index fcb9a2e1b6d467632aa3c54543946ab36e67c40d..755a1b7a2c6269803b1326fdf6a03a26798d4a47 100644
--- a/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
+++ b/Source/web/ServiceWorkerGlobalScopeClientImpl.cpp
@@ -88,6 +88,11 @@ void ServiceWorkerGlobalScopeClientImpl::didHandleSyncEvent(int syncEventID)
     m_client.didHandleSyncEvent(syncEventID);
 }
 
+void ServiceWorkerGlobalScopeClientImpl::postMessageToClient(int clientID, const WebString& message, PassOwnPtr<WebMessagePortChannelArray> webChannels)
+{
+    m_client.postMessageToClient(clientID, message, webChannels.leakPtr());
+}
+
 ServiceWorkerGlobalScopeClientImpl::ServiceWorkerGlobalScopeClientImpl(WebServiceWorkerContextClient& client)
     : m_client(client)
 {