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

chrome/browser/ui/cocoa/tab_contents/web_drag_source.mm

Index: chrome/browser/ui/cocoa/tab_contents/web_drag_source.mm
diff --git a/chrome/browser/ui/cocoa/tab_contents/web_drag_source.mm b/chrome/browser/ui/cocoa/tab_contents/web_drag_source.mm
index b3283b5c602ce5e998d4869f09eac5dbe302596d..10ee8967f140832cc1d561849ac623fc697952a2 100644
--- a/chrome/browser/ui/cocoa/tab_contents/web_drag_source.mm
+++ b/chrome/browser/ui/cocoa/tab_contents/web_drag_source.mm
@@ -6,7 +6,6 @@
 
 #include <sys/param.h>
 
-#include "app/mac/nsimage_cache.h"
 #include "base/file_path.h"
 #include "base/string_util.h"
 #include "base/sys_string_conversions.h"
@@ -26,6 +25,7 @@
 #include "net/base/file_stream.h"
 #include "net/base/net_util.h"
 #import "third_party/mozilla/NSPasteboard+Utils.h"
+#include "ui/gfx/mac/nsimage_cache.h"
 #include "webkit/glue/webdropdata.h"
 
 using base::SysNSStringToUTF8;
@@ -440,7 +440,7 @@ void PromiseWriterTask::Run() {
     return dragImage_;
 
   // Default to returning a generic image.
-  return app::mac::GetCachedImageWithName(@"nav.pdf");
+  return gfx::GetCachedImageWithName(@"nav.pdf");
 }
 
 @end  // @implementation WebDragSource (Private)