app_shell: Make renderer run background page JavaScript

chrome/browser/extensions/extension_host.h

 // Copyright (c) 2012 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_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
 
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer/elapsed_timer.h"
 #include "chrome/browser/extensions/extension_function_dispatcher.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "extensions/common/stack_frame.h"
 #include "extensions/common/view_type.h"
 
+class ExtensionService;
 class PrefsTabHelper;
 
 namespace content {
 class BrowserContext;
 class RenderProcessHost;
 class RenderWidgetHostView;
 class SiteInstance;
 }
 
 namespace extensions {
@@ skipping 89 matching lines @@
 
   // Closes this host (results in deletion).
   void Close();
 
  private:
   friend class ProcessCreationQueue;
 
   // Actually create the RenderView for this host. See CreateRenderViewSoon.
   void CreateRenderViewNow();
 
+  // Returns the ExtensionService for |browser_context_| or NULL if none exists.
+  ExtensionService* GetExtensionService();
+
   // Message handlers.
   void OnRequest(const ExtensionHostMsg_Request_Params& params);
   void OnEventAck();
   void OnIncrementLazyKeepaliveCount();
   void OnDecrementLazyKeepaliveCount();
   void OnDetailedConsoleMessageAdded(
       const base::string16& message,
       const base::string16& source,
       const StackTrace& stack_trace,
       int32 severity_level);
@@ skipping 33 matching lines @@
 
   // Used to measure how long it's been since the host was created.
   base::ElapsedTimer since_created_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionHost);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_