Cache --whitelisted-extension-id in SimpleFeature.

chrome/browser/extensions/test_extension_environment.h

 // Copyright (c) 2013 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_ENVIRONMENT_H_
 #define CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_ENVIRONMENT_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "content/public/test/test_browser_thread_bundle.h"
@@ skipping 44 matching lines @@
   // Returns ExtensionPrefs created (and owned) by the
   // TestExtensionSystem created by the TestingProfile.
   ExtensionPrefs* GetExtensionPrefs();
 
   // Creates an Extension and registers it with the ExtensionService.
   // The Extension has a default manifest of {name: "Extension",
   // version: "1.0", manifest_version: 2}, and values in
   // manifest_extra override these defaults.
   const Extension* MakeExtension(const base::Value& manifest_extra);
 
+  // Use a specific extension ID instead of the default generated in
+  // Extension::Create.
+  const Extension* MakeExtension(const base::Value& manifest_extra,
+                                 const std::string& id);
+
   // Returns a test web contents that has a tab id.
   scoped_ptr<content::WebContents> MakeTab() const;
 
  private:
   content::TestBrowserThreadBundle thread_bundle_;
 
 #if defined(OS_CHROMEOS)
   chromeos::ScopedTestDeviceSettingsService test_device_settings_service_;
   chromeos::ScopedTestCrosSettings test_cros_settings_;
   chromeos::ScopedTestUserManager test_user_manager_;
 #endif
 
 #if defined(OS_WIN)
   ui::ScopedOleInitializer ole_initializer_;
 #endif
   scoped_ptr<TestingProfile> profile_;
   ExtensionService* extension_service_;
   ExtensionPrefs* extension_prefs_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_TEST_EXTENSION_ENVIRONMENT_H_