Add testRunner.copyAtAndCapturePixelsAsyncThen() method

content/test/mock_webclipboard_impl.h

 // Copyright 2013 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 CONTENT_TEST_MOCK_WEBCLIPBOARD_IMPL_H_
 #define CONTENT_TEST_MOCK_WEBCLIPBOARD_IMPL_H_
 
 #include <map>
 
 #include "base/strings/nullable_string16.h"
 #include "base/strings/string16.h"
 #include "third_party/WebKit/public/platform/WebClipboard.h"
 #include "third_party/WebKit/public/platform/WebDragData.h"
 #include "third_party/WebKit/public/platform/WebImage.h"
 
 namespace content {
 
 class MockWebClipboardImpl : public blink::WebClipboard {
  public:
   MockWebClipboardImpl();
   virtual ~MockWebClipboardImpl();
 
+  virtual uint64_t sequenceNumber(Buffer);
   virtual bool isFormatAvailable(blink::WebClipboard::Format format,
                                  blink::WebClipboard::Buffer buffer);
   virtual blink::WebVector<blink::WebString> readAvailableTypes(
       blink::WebClipboard::Buffer buffer, bool* containsFilenames);
 
   virtual blink::WebString readPlainText(blink::WebClipboard::Buffer buffer);
   virtual blink::WebString readHTML(blink::WebClipboard::Buffer buffer,
                                      blink::WebURL* url,
                                      unsigned* fragmentStart,
                                      unsigned* fragmentEnd);
   virtual blink::WebData readImage(blink::WebClipboard::Buffer buffer);
   virtual blink::WebString readCustomData(blink::WebClipboard::Buffer buffer,
                                            const blink::WebString& type);
 
   virtual void writePlainText(const blink::WebString& plain_text);
   virtual void writeHTML(
       const blink::WebString& htmlText, const blink::WebURL& url,
       const blink::WebString& plainText, bool writeSmartPaste);
   virtual void writeURL(
       const blink::WebURL& url, const blink::WebString& title);
   virtual void writeImage(
       const blink::WebImage& image, const blink::WebURL& url,
       const blink::WebString& title);
   virtual void writeDataObject(const blink::WebDragData& data);
 
  private:
   void clear();
 
+  uint64_t m_sequenceNumber;
   base::NullableString16 m_plainText;
   base::NullableString16 m_htmlText;
   blink::WebImage m_image;
   std::map<base::string16, base::string16> m_customData;
   bool m_writeSmartPaste;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_MOCK_WEBCLIPBOARD_IMPL_H_