Refactor bookmark clipboard code to be cross platform.

chrome/browser/bookmarks/bookmark_drag_data.h

 // Copyright (c) 2006-2008 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_DRAG_DATA_H_
 #define CHROME_BROWSER_BOOKMARKS_BOOKMARK_DRAG_DATA_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 53 matching lines @@
     // ID of the node.
     int64 id_;
   };
 
   BookmarkDragData() { }
 
   // Created a BookmarkDragData populated from the arguments.
   explicit BookmarkDragData(const BookmarkNode* node);
   explicit BookmarkDragData(const std::vector<const BookmarkNode*>& nodes);
 
+  // TODO(estade): Port to mac. It should be as simple as removing this ifdef
+  // after the relevant Clipboard functions are implemetned.
+#if !defined(OS_MACOSX)
+  // Writes elements to the clipboard.
+  void WriteToClipboard(Profile* profile) const;
+
+  // Reads bookmarks from the clipboard. Prefers data written via
+  // WriteToClipboard but will also attempt to read a plain bookmark.
+  bool ReadFromClipboard();
+#endif
+
 #if defined(TOOLKIT_VIEWS)
   // Writes elements to data. If there is only one element and it is a URL
   // the URL and title are written to the clipboard in a format other apps can
   // use.
   // |profile| is used to identify which profile the data came from. Use a
   // value of null to indicate the data is not associated with any profile.
   void Write(Profile* profile, OSExchangeData* data) const;
 
   // Restores this data from the clipboard, returning true on success.
   bool Read(const OSExchangeData& data);
@@ skipping 23 matching lines @@
 
   // Number of elements.
   size_t size() const { return elements.size(); }
 
   // Returns true if this data is from the specified profile.
   bool IsFromProfile(Profile* profile) const;
 
   // The actual elements written to the clipboard.
   std::vector<Element> elements;
 
+  // The MIME type for the clipboard format for BookmarkDragData.
+  static const char* kClipboardFormatString;
+
  private:
   // Path of the profile we originated from.
 #if defined(WCHAR_T_IS_UTF16)
   std::wstring profile_path_;
 #elif defined(WCHAR_T_IS_UTF32)
   std::string profile_path_;
 #endif
 };
 
 #endif  // CHROME_BROWSER_BOOKMARKS_BOOKMARK_DRAG_DATA_H_