bookmarks: Break the dependency in ui/cocoa.

chrome/browser/bookmarks/bookmark_pasteboard_helper_mac.h

 // 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 CHROME_BROWSER_BOOKMARKS_BOOKMARK_PASTEBOARD_HELPER_MAC_H_
 #define CHROME_BROWSER_BOOKMARKS_BOOKMARK_PASTEBOARD_HELPER_MAC_H_
 
 #include "base/file_path.h"
 #include "chrome/browser/bookmarks/bookmark_node_data.h"
-#include "ui/gfx/native_widget_types.h"
 
 #if defined(__OBJC__)
-@class NSImage;
 @class NSString;
-#else  // __OBJC__
-class NSImage;
 #endif  // __OBJC__
 
 // This set of functions lets C++ code interact with the cocoa pasteboard
 // and dragging methods.
 namespace bookmark_pasteboard_helper_mac {
 
 enum PasteboardType {
   kCopyPastePasteboard,
   kDragPasteboard
 };
 
 // Writes a set of bookmark elements from a profile to the specified pasteboard.
 void WriteToPasteboard(PasteboardType type,
                        const std::vector<BookmarkNodeData::Element>& elements,
                        FilePath::StringType profile_path);
 
 // Reads a set of bookmark elements from the specified pasteboard.
 bool ReadFromPasteboard(PasteboardType type,
                         std::vector<BookmarkNodeData::Element>& elements,
                         FilePath* profile_path);
 
 // Returns true if the specified pasteboard contains any sort of
 // bookmark elements.  It currently does not consider a plaintext url a
 // valid bookmark.
 bool PasteboardContainsBookmarks(PasteboardType type);
 
-// Returns a drag image for a bookmark.
-NSImage* DragImageForBookmark(NSImage* favicon, const string16& title);
-
-// Copies the bookmark nodes to the dragging pasteboard and initiates a
-// drag from the specified view.  |view| must be a |TabContentsViewCocoa*|.
-void StartDrag(Profile* profile, const std::vector<const BookmarkNode*>& nodes,
-               gfx::NativeView view);
-
 }  // namespace bookmark_pasteboard_helper_mac
 
 #if defined(__OBJC__)
 // Pasteboard type for dictionary containing bookmark structure consisting
 // of individual bookmark nodes and/or bookmark folders.
 extern "C" NSString* const kBookmarkDictionaryListPboardType;
 #endif  // __OBJC__
 
 #endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_PASTEBOARD_HELPER_MAC_H_