Enable messaging over a navigator.connect initiated channel.

content/renderer/service_worker/embedded_worker_context_client.h

Index: content/renderer/service_worker/embedded_worker_context_client.h
diff --git a/content/renderer/service_worker/embedded_worker_context_client.h b/content/renderer/service_worker/embedded_worker_context_client.h
index 0603bed6c1b8744ace2363b0be342f66bd87ebfc..5e5f6014346332a7ef207deac62a073ffb13c73d 100644
--- a/content/renderer/service_worker/embedded_worker_context_client.h
+++ b/content/renderer/service_worker/embedded_worker_context_client.h
@@ -107,6 +107,10 @@ class EmbeddedWorkerContextClient
       int client_id,
       const blink::WebString& message,
       blink::WebMessagePortChannelArray* channels);
+  virtual void postMessageToCrossOriginClient(
+      const blink::WebCrossOriginServiceWorkerClient& client,
+      const blink::WebString& message,
+      blink::WebMessagePortChannelArray* channels);
   virtual void focus(int client_id,
                      blink::WebServiceWorkerClientFocusCallback*);
   virtual void skipWaiting(