Don't close background pages if there is a pending response (callback).

chrome/renderer/extensions/extension_dispatcher.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_RENDERER_EXTENSIONS_EXTENSION_DISPATCHER_H_
 #define CHROME_RENDERER_EXTENSIONS_EXTENSION_DISPATCHER_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 63 matching lines @@
   bool IsAdblockWithWebRequestInstalled() const {
     return webrequest_adblock_;
   }
   bool IsAdblockPlusWithWebRequestInstalled() const {
     return webrequest_adblock_plus_;
   }
   bool IsOtherExtensionWithWebRequestInstalled() const {
     return webrequest_other_;
   }
 
+  // If the extension is in fact idle, tell the browser process to close
+  // the background page.
+  void CheckIdleStatus(const std::string& extension_id);
+
  private:
   friend class RenderViewTest;
 
   // RenderProcessObserver implementation:
   virtual bool OnControlMessageReceived(const IPC::Message& message);
   virtual void WebKitInitialized();
   virtual void IdleNotification();
 
   void OnMessageInvoke(const std::string& extension_id,
                        const std::string& function_name,
@@ skipping 71 matching lines @@
   // Status of webrequest usage for known extensions.
   // TODO(mpcomplete): remove. http://crbug.com/100411
   bool webrequest_adblock_;
   bool webrequest_adblock_plus_;
   bool webrequest_other_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionDispatcher);
 };
 
 #endif  // CHROME_RENDERER_EXTENSIONS_EXTENSION_DISPATCHER_H_