Fix crash in VideoRendererBase::ThreadMain().

media/filters/video_renderer_base.h

 // Copyright (c) 2012 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.
 
 #ifndef MEDIA_FILTERS_VIDEO_RENDERER_BASE_H_
 #define MEDIA_FILTERS_VIDEO_RENDERER_BASE_H_
 
 #include <deque>
 
 #include "base/memory/ref_counted.h"
@@ skipping 163 matching lines @@
   VideoFrameQueue ready_frames_;
 
   // Used to signal |thread_| as frames are added to |frames_|.  Rule of thumb:
   // always check |state_| to see if it was set to STOPPED after waking up!
   base::ConditionVariable frame_available_;
 
   // State transition Diagram of this class:
   //       [kUninitialized] -------> [kError]
   //              |
   //              | Initialize()
+  //        [kInitializing]
+  //              |
   //              V        All frames returned
   //   +------[kFlushed]<-----[kFlushing]<--- OnDecoderResetDone()
   //   |          | Preroll() or upon                  ^
   //   |          V got first frame           [kFlushingDecoder]
   //   |      [kPrerolling]                            ^
   //   |          |                                 | Flush()
   //   |          V Got enough frames               |
   //   |      [kPrerolled]---------------------->[kPaused]
   //   |          |                Pause()          ^
   //   |          V Play()                          |
   //   |       [kPlaying]---------------------------|
   //   |          |                Pause()          ^
   //   |          V Receive EOF frame.              | Pause()
   //   |       [kEnded]-----------------------------+
   //   |                                            ^
   //   |                                            |
   //   +-----> [kStopped]                   [Any state other than]
   //                                        [kUninitialized/kError]
 
   // Simple state tracking variable.
   enum State {
     kUninitialized,
+    kInitializing,
     kPrerolled,
     kPaused,
     kFlushingDecoder,
     kFlushing,
     kFlushed,
     kPrerolling,
     kPlaying,
     kEnded,
     kStopped,
     kError,
@@ skipping 49 matching lines @@
   // either for calling |paint_cb_| or for dropping. Set to kNoTimestamp()
   // during flushing.
   base::TimeDelta last_timestamp_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoRendererBase);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_VIDEO_RENDERER_BASE_H_