Fix processing of multiple stream status changes by renderer

media/renderers/renderer_impl.h

Index: media/renderers/renderer_impl.h
diff --git a/media/renderers/renderer_impl.h b/media/renderers/renderer_impl.h
index 07ea2241cfb145ede0b0a233e3adc779bdcf1a23..4631f5edb364c94388deb7dc258cd5ff51204687 100644
--- a/media/renderers/renderer_impl.h
+++ b/media/renderers/renderer_impl.h
@@ -6,6 +6,7 @@
 #define MEDIA_RENDERERS_RENDERER_IMPL_H_
 
 #include <memory>
+#include <queue>
 #include <vector>
 
 #include "base/cancelable_callback.h"
@@ -60,7 +61,7 @@ class MEDIA_EXPORT RendererImpl : public Renderer {
   void SetVolume(float volume) final;
   base::TimeDelta GetMediaTime() final;
 
-  void RestartStreamPlayback(DemuxerStream* stream,
+  void OnStreamStatusChanged(DemuxerStream* stream,
                              bool enabled,
                              base::TimeDelta time);
 
@@ -146,6 +147,9 @@ class MEDIA_EXPORT RendererImpl : public Renderer {
   void OnVideoNaturalSizeChange(const gfx::Size& size);
   void OnVideoOpacityChange(bool opaque);
 
+  void OnAudioRestartCompleted();
+  void OnVideoRestartCompleted();
+
   State state_;
 
   // Task runner used to execute pipeline tasks.
@@ -196,7 +200,9 @@ class MEDIA_EXPORT RendererImpl : public Renderer {
   base::TimeDelta video_underflow_threshold_;
 
   bool restarting_audio_ = false;
+  std::queue<base::Closure> pending_audio_status_notifications_;
   bool restarting_video_ = false;
+  std::queue<base::Closure> pending_video_status_notifications_;
 
   base::WeakPtr<RendererImpl> weak_this_;
   base::WeakPtrFactory<RendererImpl> weak_factory_;