Always enable enhanced bookmarks external component extensions for incognito mode

chrome/browser/extensions/extension_service.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_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 522 matching lines @@
   // Add extensions in |blocked| to blacklisted_extensions, remove extensions
   // that are neither in |blocked|, nor in |unchanged|.
   void UpdateBlockedExtensions(const extensions::ExtensionIdSet& blocked,
                                const extensions::ExtensionIdSet& unchanged);
 
   void UpdateGreylistedExtensions(
       const extensions::ExtensionIdSet& greylist,
       const extensions::ExtensionIdSet& unchanged,
       const extensions::Blacklist::BlacklistStateMap& state_map);
 
+  // Helper to determine if the the extension should be enabled by default for
+  // incognito mode. This is permitted for selected external component
+  // extensions. (Internal component extensions are enabled in incognito by
+  // default.)
+  static bool ShouldEnableForIncognito(const extensions::Extension* extension);
+
   // Used only by test code.
   void UnloadAllExtensionsInternal();
 
   // Disable apps & extensions now to stop them from running after a profile
   // has been conceptually deleted. Don't wait for full browser shutdown and
   // the actual profile objects to be destroyed.
   void OnProfileDestructionStarted();
 
   // Called on file task runner thread to uninstall extension.
   static void UninstallExtensionOnFileThread(
@@ skipping 153 matching lines @@
                            GreylistedExtensionDisabled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistDontEnableManuallyDisabled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            GreylistUnknownDontChange);
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SERVICE_H_