Changed the extension.connect() API not to broadcast to all tabs. Added a

chrome/browser/renderer_host/render_view_host.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/render_view_host.h"
 
 #include <string>
 #include <vector>
 
 #include "app/resource_bundle.h"
@@ skipping 1537 matching lines @@
 
 void RenderViewHost::SendExtensionResponse(int request_id, bool success,
                                            const std::string& response,
                                            const std::string& error) {
   Send(new ViewMsg_ExtensionResponse(routing_id(), request_id, success,
       response, error));
 }
 
 void RenderViewHost::OnExtensionPostMessage(
     int port_id, const std::string& message) {
-  URLRequestContext* context = process()->profile()->GetRequestContext();
-  ExtensionMessageService::GetInstance(context)->
-      PostMessageFromRenderer(port_id, message);
+  if (process()->profile()->GetExtensionMessageService()) {
+    process()->profile()->GetExtensionMessageService()->
+        PostMessageFromRenderer(port_id, message);
+  }
 }
 
 void RenderViewHost::OnAccessibilityFocusChange(int acc_obj_id) {
 #if defined(OS_WIN)
   BrowserAccessibilityManager::GetInstance()->
       ChangeAccessibilityFocus(acc_obj_id, process()->pid(), routing_id());
 #else
   // TODO(port): accessibility not yet implemented. See http://crbug.com/8288.
 #endif
 }
 
 void RenderViewHost::OnCSSInserted() {
   delegate_->DidInsertCSS();
 }
 
 void RenderViewHost::SignalModalDialogEvent() {
   if (modal_dialog_count_++ == 0)
     modal_dialog_event_->Signal();
 }
 
 void RenderViewHost::ResetModalDialogEvent() {
  if (--modal_dialog_count_ == 0)
    modal_dialog_event_->Reset();
 }