Change the ChromiumPasteboard to have a notion of an alternate clipboard...

webkit/glue/webclipboard_impl.h

Index: webkit/glue/webclipboard_impl.h
===================================================================
--- webkit/glue/webclipboard_impl.h	(revision 25640)
+++ webkit/glue/webclipboard_impl.h	(working copy)
@@ -5,6 +5,7 @@
 #ifndef WEBCLIPBOARD_IMPL_H_
 #define WEBCLIPBOARD_IMPL_H_
 
+#include "base/clipboard.h"
 #include "webkit/api/public/WebClipboard.h"
 
 #include <string>
@@ -21,9 +22,9 @@
   virtual ~WebClipboardImpl() {}
 
   // WebClipboard methods:
-  virtual bool isFormatAvailable(WebKit::WebClipboard::Format);
-  virtual WebKit::WebString readPlainText();
-  virtual WebKit::WebString readHTML(WebKit::WebURL* source_url);
+  virtual bool isFormatAvailable(Format, Buffer);
+  virtual WebKit::WebString readPlainText(Buffer);
+  virtual WebKit::WebString readHTML(Buffer, WebKit::WebURL* source_url);
   virtual void writeHTML(
       const WebKit::WebString& html_text,
       const WebKit::WebURL& source_url,
@@ -36,6 +37,9 @@
       const WebKit::WebImage&,
       const WebKit::WebURL& source_url,
       const WebKit::WebString& title);
+
+ private:
+  bool ConvertBufferType(Buffer, Clipboard::Buffer*);
 };
 
 }  // namespace webkit_glue