cc: Keep a reference on the media::VideoFrame.

cc/layers/video_frame_provider_client_impl.cc

 // 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.
 
 #include "cc/layers/video_frame_provider_client_impl.h"
 
 #include "cc/base/math_util.h"
 #include "cc/layers/video_layer_impl.h"
 
 namespace cc {
@@ skipping 26 matching lines @@
       0.0, 0.0, 0.0, 1.0);
 }
 
 void VideoFrameProviderClientImpl::Stop() {
   if (!provider_)
     return;
   provider_->SetVideoFrameProviderClient(NULL);
   provider_ = NULL;
 }
 
-media::VideoFrame* VideoFrameProviderClientImpl::AcquireLockAndCurrentFrame() {
+scoped_refptr<media::VideoFrame>
+VideoFrameProviderClientImpl::AcquireLockAndCurrentFrame() {
   provider_lock_.Acquire();  // Balanced by call to ReleaseLock().
   if (!provider_)
     return NULL;
 
   return provider_->GetCurrentFrame();
 }
 
-void VideoFrameProviderClientImpl::PutCurrentFrame(media::VideoFrame* frame) {
+void VideoFrameProviderClientImpl::PutCurrentFrame(
+    const scoped_refptr<media::VideoFrame>& frame) {
   provider_lock_.AssertAcquired();
   provider_->PutCurrentFrame(frame);
 }
 
 void VideoFrameProviderClientImpl::ReleaseLock() {
   provider_lock_.AssertAcquired();
   provider_lock_.Release();
 }
 
 void VideoFrameProviderClientImpl::StopUsingProvider() {
   // Block the provider from shutting down until this client is done
   // using the frame.
   base::AutoLock locker(provider_lock_);
-  provider_ = 0;
+  provider_ = NULL;
 }
 
 void VideoFrameProviderClientImpl::DidReceiveFrame() {
   if (active_video_layer_)
     active_video_layer_->SetNeedsRedraw();
 }
 
 void VideoFrameProviderClientImpl::DidUpdateMatrix(const float* matrix) {
   stream_texture_matrix_ = gfx::Transform(
       matrix[0], matrix[4], matrix[8], matrix[12],
       matrix[1], matrix[5], matrix[9], matrix[13],
       matrix[2], matrix[6], matrix[10], matrix[14],
       matrix[3], matrix[7], matrix[11], matrix[15]);
   if (active_video_layer_)
     active_video_layer_->SetNeedsRedraw();
 }
 
 }  // namespace cc