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

ui/gfx/mac/nsimage_cache.mm

-// 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.
 
-#include "app/mac/nsimage_cache.h"
+#include "ui/gfx/mac/nsimage_cache.h"
 
 #import <AppKit/AppKit.h>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
 
 // When C++ exceptions are disabled, the C++ library defines |try| and
 // |catch| so as to allow exception-expecting C++ code to build properly when
 // language support for exceptions is not present.  These macros interfere
 // with the use of |@try| and |@catch| in Objective-C files such as this one.
 // Undefine these macros here, after everything has been #included, since
 // there will be no C++ uses and only Objective-C uses from this point on.
 #undef try
 #undef catch
 
-namespace app {
-namespace mac {
+namespace gfx {
 
 static NSMutableDictionary* image_cache = nil;
 
 NSImage* GetCachedImageWithName(NSString* name) {
   DCHECK(name);
 
   // NOTE: to make this thread safe, we'd have to sync on the cache and
   // also force all the bundle calls on the main thread.
 
   if (!image_cache) {
@@ skipping 31 matching lines @@
   // TODO: if we ever limit the cache size, this should retain & autorelease
   // the image.
   return result;
 }
 
 void ClearCachedImages(void) {
   // NOTE: to make this thread safe, we'd have to sync on the cache.
   [image_cache removeAllObjects];
 }
 
-}  // namespace mac
-}  // namespace app
+}  // namespace gfx