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

webkit/tools/test_shell/mock_webclipboard_impl.h

 // Copyright (c) 2009 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.
 //
 // This file mocks out just enough of the WebClipboard API for running the
 // webkit tests. This is so we can run webkit tests without them sharing a
 // clipboard, which allows for running them in parallel and having the tests
 // not interact with actual user actions.
 
 #ifndef WEBKIT_TOOLS_TEST_SHELL_MOCK_WEBCLIPBOARD_IMPL_H_
 #define WEBKIT_TOOLS_TEST_SHELL_MOCK_WEBCLIPBOARD_IMPL_H_
 
 #include "webkit/api/public/WebClipboard.h"
 #include "webkit/api/public/WebString.h"
 
 class MockWebClipboardImpl : public WebKit::WebClipboard {
  public:
-  virtual bool isFormatAvailable(WebKit::WebClipboard::Format);
+  virtual bool isFormatAvailable(WebKit::WebClipboard::Format,
+                                 WebKit::WebClipboard::Buffer);
 
-  virtual WebKit::WebString readPlainText();
-  virtual WebKit::WebString readHTML(WebKit::WebURL*);
+  virtual WebKit::WebString readPlainText(WebKit::WebClipboard::Buffer);
+  virtual WebKit::WebString readHTML(WebKit::WebClipboard::Buffer,
+                                     WebKit::WebURL*);
 
   virtual void writeHTML(
       const WebKit::WebString& htmlText, const WebKit::WebURL&,
       const WebKit::WebString& plainText, bool writeSmartPaste);
   virtual void writeURL(
       const WebKit::WebURL&, const WebKit::WebString& title);
   virtual void writeImage(
       const WebKit::WebImage&, const WebKit::WebURL&,
       const WebKit::WebString& title);
 
  private:
   WebKit::WebString m_plainText;
   WebKit::WebString m_htmlText;
   bool m_writeSmartPaste;
 };
 
 #endif  // WEBKIT_TOOLS_TEST_SHELL_MOCK_WEBCLIPBOARD_IMPL_H_