Reland: Change VideoCaptureDeliverFrameCB's signature

content/renderer/media/webrtc/webrtc_video_track_adapter.cc

 // 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.
 
 #include "content/renderer/media/webrtc/webrtc_video_track_adapter.h"
 
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/lock.h"
@@ skipping 30 matching lines @@
 
   // WebRtcVideoTrackAdapter can be destroyed on the main render thread or
   // libjingles worker thread since it posts video frames on that thread. But
   // |video_source_| must be released on the main render thread before the
   // PeerConnectionFactory has been destroyed. The only way to ensure that is
   // to make sure |video_source_| is released when WebRtcVideoTrackAdapter() is
   // destroyed.
   void ReleaseSourceOnMainThread();
 
   void OnVideoFrameOnIO(const scoped_refptr<media::VideoFrame>& frame,
-                        const base::TimeTicks& estimated_capture_time);
+                        base::TimeTicks estimated_capture_time);
 
  private:
   void OnVideoFrameOnWorkerThread(
       const scoped_refptr<media::VideoFrame>& frame);
   friend class base::RefCountedThreadSafe<WebRtcVideoSourceAdapter>;
   virtual ~WebRtcVideoSourceAdapter();
 
   scoped_refptr<base::SingleThreadTaskRunner> render_thread_task_runner_;
 
   // |render_thread_checker_| is bound to the main render thread.
@@ skipping 45 matching lines @@
   // on that thread. However, since |video_source_| was created on the render
   // thread, it should be released on the render thread.
   base::AutoLock auto_lock(capture_adapter_stop_lock_);
   // |video_source| owns |capture_adapter_|.
   capture_adapter_ = NULL;
   video_source_ = NULL;
 }
 
 void WebRtcVideoTrackAdapter::WebRtcVideoSourceAdapter::OnVideoFrameOnIO(
     const scoped_refptr<media::VideoFrame>& frame,
-    const base::TimeTicks& estimated_capture_time) {
+    base::TimeTicks estimated_capture_time) {
   DCHECK(io_thread_checker_.CalledOnValidThread());
   libjingle_worker_thread_->PostTask(
       FROM_HERE,
       base::Bind(&WebRtcVideoSourceAdapter::OnVideoFrameOnWorkerThread,
                  this,
                  frame));
 }
 
 void
 WebRtcVideoTrackAdapter::WebRtcVideoSourceAdapter::OnVideoFrameOnWorkerThread(
@@ skipping 47 matching lines @@
   RemoveFromVideoTrack(this, web_track_);
   source_adapter_->ReleaseSourceOnMainThread();
 }
 
 void WebRtcVideoTrackAdapter::OnEnabledChanged(bool enabled) {
   DCHECK(thread_checker_.CalledOnValidThread());
   video_track_->set_enabled(enabled);
 }
 
 }  // namespace content