Implement externally_connectable! Web pages can now communicate directly with

chrome/browser/extensions/api/messaging/message_service.h

Index: chrome/browser/extensions/api/messaging/message_service.h
diff --git a/chrome/browser/extensions/api/messaging/message_service.h b/chrome/browser/extensions/api/messaging/message_service.h
index 2236b82d7b2a6c3fc08d1e159ca3c8b473bf3549..2ef75334404c27e7c4cf9b15608ac8c03c82661e 100644
--- a/chrome/browser/extensions/api/messaging/message_service.h
+++ b/chrome/browser/extensions/api/messaging/message_service.h
@@ -212,6 +212,17 @@ class MessageService : public ProfileKeyedAPI,
       PostMessage(port_id, message.Pass());
   }
 
+  // Immediate dispatches a disconnect to |source| for |port_id| given |reason|.

[Jeffrey Yasskin, 2013/06/08 00:28:09]

Is "reason" a human-readable string or something else? What does extension_id
mean about the behavior?

[not at google - send to devlin, 2013/06/08 02:02:33]

Done.

+  void DispatchOnDisconnect(content::RenderProcessHost* source,
+                            int port_id,
+                            const std::string& extension_id,
+                            const std::string& reason);
+  void DispatchOnDisconnect(content::RenderProcessHost* source,
+                            int port_id,
+                            const std::string& reason) {
+    DispatchOnDisconnect(source, port_id, std::string(), reason);
+  }
+
   // ProfileKeyedAPI implementation.
   static const char* service_name() {
     return "MessageService";