Initial implementation of stashed message ports, blink side

public/web/WebServiceWorkerContextProxy.h

Index: public/web/WebServiceWorkerContextProxy.h
diff --git a/public/web/WebServiceWorkerContextProxy.h b/public/web/WebServiceWorkerContextProxy.h
index 72e63fefc33137c6599ee988ee929bf15149cefe..ec71310cedf5532c6a87e84cbb6459c4626d0c09 100644
--- a/public/web/WebServiceWorkerContextProxy.h
+++ b/public/web/WebServiceWorkerContextProxy.h
@@ -70,6 +70,8 @@ public:
     // Once the ServiceWorker has finished handling the sync event
     // didHandleSyncEvent is called on the context client.
     virtual void dispatchSyncEvent(int syncEventID) = 0;
+
+    virtual void addStashedMessagePorts(const WebMessagePortChannelArray& channels, const WebVector<WebString>& channelNames) = 0;
 };
 
 } // namespace blink