[EXPERIMENTAL] Async copy texture backed frames in WebRtcVideoCapturerAdapter

content/renderer/media/webrtc/webrtc_video_capturer_adapter.h

Index: content/renderer/media/webrtc/webrtc_video_capturer_adapter.h
diff --git a/content/renderer/media/webrtc/webrtc_video_capturer_adapter.h b/content/renderer/media/webrtc/webrtc_video_capturer_adapter.h
index 7b3877c37b3ab83effde76324ac003a8c2264c00..cd1c56f88d790482730b2bc6f5ff8f62be81f960 100644
--- a/content/renderer/media/webrtc/webrtc_video_capturer_adapter.h
+++ b/content/renderer/media/webrtc/webrtc_video_capturer_adapter.h
@@ -38,6 +38,8 @@ class CONTENT_EXPORT WebRtcVideoCapturerAdapter
   // libjingles worker thread.
   // This method is virtual for testing purposes.
   virtual void OnFrameCaptured(const scoped_refptr<media::VideoFrame>& frame);
+  void OnFrameCopied(int64_t translated_camera_time_us,
+                     const scoped_refptr<media::VideoFrame>& frame);
 
  private:
   // cricket::VideoCapturer implementation.
@@ -51,6 +53,10 @@ class CONTENT_EXPORT WebRtcVideoCapturerAdapter
                             cricket::VideoFormat* best_format) override;
   bool IsScreencast() const override;
 
+  // Helper class used for copying texture backed frames.
+  class TextureFrameCopier;
+  const scoped_refptr<TextureFrameCopier> texture_copier_;
+
   // |thread_checker_| is bound to the libjingle worker thread.
   base::ThreadChecker thread_checker_;