bookmarks: Extract PerformBookmarkDrop() function out of bookmark_utils.h

chrome/browser/ui/cocoa/bookmarks/bookmark_drag_drop.h

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_drag_drop.h
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_drag_drop.h b/chrome/browser/ui/cocoa/bookmarks/bookmark_drag_drop.h
deleted file mode 100644
index ed2ac086617072afbcac7c766c78f0b7a82f86ce..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_drag_drop.h
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 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_UI_BOOKMARKS_BOOKMARK_DRAG_DROP_H_
-#define CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_DRAG_DROP_H_
-
-#include "base/string16.h"
-
-#if defined(__OBJC__)
-@class NSImage;
-#else  // __OBJC__
-class NSImage;
-#endif  // __OBJC__
-
-namespace chrome {
-
-// Returns a drag image for a bookmark.
-NSImage* DragImageForBookmark(NSImage* favicon, const string16& title);
-
-}  // namespace chrome
-
-#endif  // CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_DRAG_DROP_H_