Initial implementation of stashed message ports, blink side

public/web/WebServiceWorkerContextClient.h

Index: public/web/WebServiceWorkerContextClient.h
diff --git a/public/web/WebServiceWorkerContextClient.h b/public/web/WebServiceWorkerContextClient.h
index 2759bee3c7368b7a337dba70ef8f6711f7c72f28..a2af4562dc9cbfc7d64fe10418b560943f0b8846 100644
--- a/public/web/WebServiceWorkerContextClient.h
+++ b/public/web/WebServiceWorkerContextClient.h
@@ -186,6 +186,9 @@ public:
     // Ownership of the passed callbacks is transferred to the callee, callee
     // should delete the callback after calling either onSuccess or onError.
     virtual void focus(const WebString& uuid, WebServiceWorkerClientCallbacks*) { BLINK_ASSERT_NOT_REACHED(); }
+
+    // Ownership of the passed WebMessagePortChannel is NOT passed to the callee.
+    virtual void stashMessagePort(WebMessagePortChannel*, const WebString& name) { BLINK_ASSERT_NOT_REACHED(); }
 };
 
 } // namespace blink