Mac: Enable delegated renderer by default

content/browser/cocoa/system_hotkey_helper_mac.h

-// Copyright 2014 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 CONTENT_BROWSER_COCOA_SYSTEM_HOTKEY_HELPER_MAC_H_
-#define CONTENT_BROWSER_COCOA_SYSTEM_HOTKEY_HELPER_MAC_H_
-
-#include "base/memory/singleton.h"
-#include "base/memory/weak_ptr.h"
-
-#ifdef __OBJC__
-@class NSDictionary;
-#else
-class NSDictionary;
-#endif
-
-namespace content {
-
-class SystemHotkeyMap;
-
-// This singleton holds a global mapping of hotkeys reserved by OSX.
-class SystemHotkeyHelperMac {
- public:
-  // Return pointer to the singleton instance for the current process.
-  static SystemHotkeyHelperMac* GetInstance();
-
-  // Loads the system hot keys after a brief delay, to reduce file system access
-  // immediately after launch.
-  void DeferredLoadSystemHotkeys();
-
-  // Guaranteed to not be NULL.
-  SystemHotkeyMap* map() { return map_.get(); }
-
- private:
-  friend struct DefaultSingletonTraits<SystemHotkeyHelperMac>;
-
-  SystemHotkeyHelperMac();
-  ~SystemHotkeyHelperMac();
-
-  // Must be called from the FILE thread. Loads the file containing the system
-  // hotkeys into a NSDictionary* object, and passes the result to FileDidLoad
-  // on the UI thread.
-  void LoadSystemHotkeys();
-
-  // Must be called from the UI thread.  This takes ownership of |dictionary|.
-  // Parses the system hotkeys from the plist stored in |dictionary|.
-  void FileDidLoad(NSDictionary* dictionary);
-
-  scoped_ptr<SystemHotkeyMap> map_;
-
-  DISALLOW_COPY_AND_ASSIGN(SystemHotkeyHelperMac);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_COCOA_SYSTEM_HOTKEY_HELPER_MAC_H_