This defers starting background extension page RenderViews

chrome/browser/extensions/test_extension_system.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_TEST_EXTENSION_SYSTEM_H_
 #define CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_SYSTEM_H_
 
 #include "chrome/browser/extensions/extension_system.h"
 
 class CommandLine;
@@ skipping 32 matching lines @@
       const CommandLine* command_line,
       const base::FilePath& install_directory,
       bool autoupdate_enabled);
 
   // Creates an ExtensionProcessManager. If not invoked, the
   // ExtensionProcessManager is NULL.
   void CreateExtensionProcessManager();
 
   void CreateSocketManager();
 
-  virtual void InitForRegularProfile(bool extensions_enabled) OVERRIDE {}
+  virtual void InitForRegularProfile(bool extensions_enabled,
+                                     bool defer_background_creation) OVERRIDE {}
   void SetExtensionService(ExtensionService* service);
   virtual ExtensionService* extension_service() OVERRIDE;
   virtual ManagementPolicy* management_policy() OVERRIDE;
   virtual UserScriptMaster* user_script_master() OVERRIDE;
   virtual ExtensionProcessManager* process_manager() OVERRIDE;
   virtual StateStore* state_store() OVERRIDE;
   virtual StateStore* rules_store() OVERRIDE;
   TestingValueStore* value_store() { return value_store_; }
   virtual ExtensionInfoMap* info_map() OVERRIDE;
   virtual LazyBackgroundTaskQueue* lazy_background_task_queue() OVERRIDE;
@@ skipping 25 matching lines @@
   scoped_ptr<ExtensionService> extension_service_;
   scoped_ptr<ExtensionProcessManager> extension_process_manager_;
   scoped_refptr<ExtensionInfoMap> info_map_;
   scoped_ptr<ErrorConsole> error_console_;
   OneShotEvent ready_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_SYSTEM_H_