Implement Clipboard::ReadData and Clipboard::WriteData for Mac.

ui/base/clipboard/clipboard.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 UI_BASE_CLIPBOARD_CLIPBOARD_H_
 #define UI_BASE_CLIPBOARD_CLIPBOARD_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 154 matching lines @@
 
   // Reads a file or group of files from the clipboard, if available, into the
   // out parameter.
   void ReadFile(FilePath* file) const;
   void ReadFiles(std::vector<FilePath>* files) const;
 
   // Reads raw data from the clipboard with the given format type. Stores result
   // as a byte vector.
   // TODO(dcheng): Due to platform limitations on Windows, we should make sure
   // format is never controlled by the user.
-  void ReadData(const std::string& format, std::string* result);
+  void ReadData(const std::string& format, std::string* result) const;
 
   // Get format Identifiers for various types.
   static FormatType GetUrlFormatType();
   static FormatType GetUrlWFormatType();
   static FormatType GetMozUrlFormatType();
   static FormatType GetPlainTextFormatType();
   static FormatType GetPlainTextWFormatType();
   static FormatType GetFilenameFormatType();
   static FormatType GetFilenameWFormatType();
   static FormatType GetWebKitSmartPasteFormatType();
@@ skipping 32 matching lines @@
 
   void WriteBookmark(const char* title_data,
                      size_t title_len,
                      const char* url_data,
                      size_t url_len);
 
   void WriteWebSmartPaste();
 
   void WriteBitmap(const char* pixel_data, const char* size_data);
 
-#if !defined(OS_MACOSX)
   // |format_name| is an ASCII string and should be NULL-terminated.
   // TODO(estade): port to mac.

[tony, 2011/12/05 18:56:09]

Nit: Get rid of the TODO.

[dcheng, 2011/12/05 19:53:03]

Done.

   void WriteData(const char* format_name, size_t format_len,
                  const char* data_data, size_t data_len);
-#endif
 #if defined(OS_WIN)
   void WriteBitmapFromHandle(HBITMAP source_hbitmap,
                              const gfx::Size& size);
 
   // Safely write to system clipboard. Free |handle| on failure.
   void WriteToClipboard(unsigned int format, HANDLE handle);
 
   static void ParseBookmarkClipboardFormat(const string16& bookmark,
                                            string16* title,
                                            std::string* url);
@@ skipping 40 matching lines @@
   static const char kMimeTypeText[];
   static const char kMimeTypeHTML[];
   static const char kMimeTypePNG[];
 
   DISALLOW_COPY_AND_ASSIGN(Clipboard);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CLIPBOARD_CLIPBOARD_H_