Register clipboard image blob in the browser process to copy data less.

content/renderer/renderer_clipboard_delegate.h

 // Copyright (c) 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 CONTENT_RENDERER_RENDERER_CLIPBOARD_DELEGATE_H_
 #define CONTENT_RENDERER_RENDERER_CLIPBOARD_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 22 matching lines @@
   void ReadAvailableTypes(ui::ClipboardType type,
                           std::vector<base::string16>* types,
                           bool* contains_filenames);
   void ReadText(ui::ClipboardType type, base::string16* result);
   void ReadHTML(ui::ClipboardType type,
                 base::string16* markup,
                 GURL* url,
                 uint32_t* fragment_start,
                 uint32_t* fragment_end);
   void ReadRTF(ui::ClipboardType type, std::string* result);
-  void ReadImage(ui::ClipboardType type, std::string* data);
+  void ReadImage(ui::ClipboardType type,
+                 std::string* blob_uuid,
+                 std::string* mime_type,
+                 int64_t* size);
   void ReadCustomData(ui::ClipboardType clipboard_type,
                       const base::string16& type,
                       base::string16* data);
 
   void WriteText(ui::ClipboardType type, const base::string16& text);
   void WriteHTML(ui::ClipboardType type,
                  const base::string16& markup,
                  const GURL& url);
   void WriteSmartPasteMarker(ui::ClipboardType type);
   void WriteCustomData(ui::ClipboardType type,
                        const std::map<base::string16, base::string16>& data);
   void WriteBookmark(ui::ClipboardType type,
                      const GURL& url,
                      const base::string16& title);
   bool WriteImage(ui::ClipboardType type, const SkBitmap& bitmap);
   void CommitWrite(ui::ClipboardType type);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(RendererClipboardDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDERER_CLIPBOARD_DELEGATE_H_