DevTools: FrameRecorder: add cancelRecordingFrames command

content/browser/devtools/protocol/frame_recorder.h

 // Copyright 2014 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_BROWSER_DEVTOOLS_PROTOCOL_FRAME_RECORDER_H_
 #define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_FRAME_RECORDER_H_
 
 #include <string>
+#include <utility>
 #include <vector>
 
 #include "base/callback.h"
+#include "base/cancelable_callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "content/browser/devtools/protocol/devtools_protocol_handler.h"
 #include "content/public/browser/readback_types.h"
 
 class SkBitmap;
 
 namespace content {
 
 class RenderViewHostImpl;
 
 namespace devtools {
 namespace page {
 
+using EncodedFrame = std::pair<std::string, double>;
+
 class FrameRecorder {
  public:
   using Response = DevToolsProtocolClient::Response;
   using StopRecordingFramesCallback =
       base::Callback<void(scoped_refptr<StopRecordingFramesResponse>)>;
 
   explicit FrameRecorder();
   virtual ~FrameRecorder();
 
   Response StartRecordingFrames(int max_frame_count);
   Response StopRecordingFrames(StopRecordingFramesCallback callback);
+  Response CancelRecordingFrames();
 
   void SetRenderViewHost(RenderViewHostImpl* host);
   void OnSwapCompositorFrame();
 
  private:
   enum State {
     Ready,
     Recording,
     Encoding
   };
 
   void FrameCaptured(const SkBitmap& bitmap, ReadbackResponse response);
-  void FrameEncoded(double timestamp, const std::string& encoded_frame);
+  void FrameEncoded(const scoped_ptr<EncodedFrame>& encoded_frame);
   void MaybeSendResponse();
 
   RenderViewHostImpl* host_;
   State state_;
   StopRecordingFramesCallback callback_;
   size_t inflight_requests_count_;
   size_t max_frame_count_;
   size_t captured_frames_count_;
   base::Time last_captured_frame_timestamp_;
   std::vector<scoped_refptr<devtools::page::RecordedFrame>> frames_;
 
+  base::CancelableCallback<void(const scoped_ptr<EncodedFrame>&)>
+      frame_encoded_callback_;
   base::WeakPtrFactory<FrameRecorder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameRecorder);
 };
 
 }  // namespace page
 }  // namespace devtools
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_FRAME_RECORDER_H_