Move app/mac/ files to ui/gfx/mac/ directory.

ui/gfx/mac/nsimage_cache.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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 APP_MAC_NSIMAGE_CACHE_H_
-#define APP_MAC_NSIMAGE_CACHE_H_
+#ifndef UI_GFX_MAC_NSIMAGE_CACHE_H_
+#define UI_GFX_MAC_NSIMAGE_CACHE_H_
 #pragma once
 
 #ifdef __OBJC__
 @class NSImage;
 @class NSString;
 #else
 class NSImage;
 class NSString;
 #endif
 
-namespace app {
-namespace mac {
+namespace gfx {
 
 // Returns an autoreleased image from the main app bundle
 // (mac_util::MainAppBundle()) with the given name, and keeps it in memory so
 // future fetches are fast.
 // NOTE:
 //   - This should only be called on the main thread.
 //   - The caller should retain the image if they want to keep it around, as
 //     the cache could have limit on size/lifetime, etc.
 NSImage* GetCachedImageWithName(NSString* name);
 
 // Clears the image cache.
 void ClearCachedImages(void);
 
-}  // namespace mac
-}  // namespace app
+}  // namespace gfx
 
-#endif  // APP_MAC_NSIMAGE_CACHE_H_
+#endif  // UI_GFX_MAC_NSIMAGE_CACHE_H_