Clear VideoRendererBase::current_frame_ when stopped.

media/filters/video_renderer_base.cc

 // Copyright (c) 2011 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 "base/bind.h"
 #include "base/callback.h"
 #include "base/threading/platform_thread.h"
 #include "media/base/buffers.h"
 #include "media/base/filter_host.h"
 #include "media/base/limits.h"
@@ skipping 459 matching lines @@
   // Scale our sleep based on the playback rate.
   // TODO(scherkus): floating point badness and degrade gracefully.
   return base::TimeDelta::FromMicroseconds(
       static_cast<int64>(sleep.InMicroseconds() / playback_rate));
 }
 
 void VideoRendererBase::DoStopOrError_Locked() {
   DCHECK(!pending_paint_);
   DCHECK(!pending_paint_with_last_available_);
   lock_.AssertAcquired();
+  current_frame_ = NULL;
   last_available_frame_ = NULL;
   DCHECK(!pending_read_);
 }
 
 }  // namespace media