Add stubs and glue for routing a request for an image from the clipboard.

webkit/glue/webclipboard_impl.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 WEBCLIPBOARD_IMPL_H_
 #define WEBCLIPBOARD_IMPL_H_
 
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebClipboard.h"
 #include "ui/base/clipboard/clipboard.h"
 
 #include <string>
 
 namespace webkit_glue {
 
 class WebClipboardImpl : public WebKit::WebClipboard {
  public:
   static std::string URLToMarkup(const WebKit::WebURL& url,
       const WebKit::WebString& title);
   static std::string URLToImageMarkup(const WebKit::WebURL& url,
       const WebKit::WebString& title);
 
   virtual ~WebClipboardImpl();
 
   // WebClipboard methods:
   virtual bool isFormatAvailable(Format, Buffer);
   virtual WebKit::WebString readPlainText(Buffer);
   virtual WebKit::WebString readHTML(Buffer, WebKit::WebURL* source_url);
+  virtual WebKit::WebData readImage(Buffer);
   virtual void writeHTML(
       const WebKit::WebString& html_text,
       const WebKit::WebURL& source_url,
       const WebKit::WebString& plain_text,
       bool write_smart_paste);
   virtual void writePlainText(const WebKit::WebString& plain_text);
   virtual void writeURL(
       const WebKit::WebURL&,
       const WebKit::WebString& title);
   virtual void writeImage(
@@ skipping 11 matching lines @@
       WebKit::WebString* data, WebKit::WebString* metadata);
   virtual WebKit::WebVector<WebKit::WebString> readFilenames(Buffer);
 
  private:
   bool ConvertBufferType(Buffer, ui::Clipboard::Buffer*);
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBCLIPBOARD_IMPL_H_