Add extensions code to use common updater in components/update_client/

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 "base/memory/scoped_ptr.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/common/one_shot_event.h"
@@ skipping 40 matching lines @@
   StateStore* state_store() override;
   StateStore* rules_store() override;
   TestingValueStore* value_store() { return value_store_; }
   InfoMap* info_map() override;
   QuotaService* quota_service() override;
   AppSorting* app_sorting() override;
   const OneShotEvent& ready() const override;
   ContentVerifier* content_verifier() override;
   scoped_ptr<ExtensionSet> GetDependentExtensions(
       const Extension* extension) override;
+  void InstallUpdate(const std::string& extension_id,
+                     const base::FilePath& temp_dir) override;
 
   // Note that you probably want to use base::RunLoop().RunUntilIdle() right
   // after this to run all the accumulated tasks.
   void SetReady() { ready_.Signal(); }
 
   // Factory method for tests to use with SetTestingProfile.
   static scoped_ptr<KeyedService> Build(content::BrowserContext* profile);
 
   // Used by ExtensionPrefsTest to re-create the AppSorting after it has
   // re-created the ExtensionPrefs instance (this can never happen in non-test
@@ skipping 12 matching lines @@
   scoped_ptr<ExtensionService> extension_service_;
   scoped_refptr<InfoMap> info_map_;
   scoped_ptr<QuotaService> quota_service_;
   scoped_ptr<AppSorting> app_sorting_;
   OneShotEvent ready_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_SYSTEM_H_