Add blink-side plumbing for ServiceWorker -> Document postMessage (1/3)

public/web/WebServiceWorkerContextClient.h

 /*
  * Copyright (C) 2013 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 14 matching lines @@
  * 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 WebServiceWorkerContextClient_h
 #define WebServiceWorkerContextClient_h
 
 #include "WebWorkerPermissionClientProxy.h"
+#include "public/platform/WebMessagePortChannel.h"
 #include "public/platform/WebServiceWorkerClientsInfo.h"
 #include "public/platform/WebServiceWorkerEventResult.h"
 #include "public/platform/WebURL.h"
 
 namespace blink {
 
 class WebDataSource;
 class WebServiceWorkerContextProxy;
 class WebServiceWorkerNetworkProvider;
 class WebServiceWorkerResponse;
@@ skipping 68 matching lines @@
     virtual void didHandleSyncEvent(int syncEventID) { }
 
     // Ownership of the returned object is transferred to the caller.
     virtual WebServiceWorkerNetworkProvider* createServiceWorkerNetworkProvider(blink::WebDataSource*) { return 0; }
 
     // Ownership of the passed callbacks is transferred to the callee, callee
     // should delete the callbacks after calling either onSuccess or onError.
     // WebServiceWorkerClientsInfo and WebServiceWorkerError ownerships are
     // passed to the WebServiceWorkerClientsCallbacks implementation.
     virtual void getClients(WebServiceWorkerClientsCallbacks*) { BLINK_ASSERT_NOT_REACHED(); }
+
+    // Callee receives ownership of the passed vector.
+    // FIXME: Blob refs should be passed to maintain ref counts. crbug.com/351753
+    virtual void postMessageToClient(int clientID, const WebString&, WebMessagePortChannelArray*) { BLINK_ASSERT_NOT_REACHED(); }
 };
 
 } // namespace blink
 
 #endif // WebWorkerContextClient_h