Revert 150591 - Remove Pipeline::kEnded state as it is redundant with Pipeline::kStarted.

media/base/pipeline.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_BASE_PIPELINE_H_
 #define MEDIA_BASE_PIPELINE_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 62 matching lines @@
 //   [ InitXXX (for each filter) ] -------->[ Stopping (for each filter) ]
 //         |                                              ^
 //         V                                              | if Stop
 //   [ Seeking (for each filter) ] <--------[ Flushing (for each filter) ]
 //         |                         if Seek              ^
 //         V                                              |
 //   [ Starting (for each filter) ]                       |
 //         |                                              |
 //         V      Seek()/Stop()                           |
 //   [ Started ] -------------------------> [ Pausing (for each filter) ]
+//         |                                              ^
+//         |   OnRendererEnded()             Seek()/Stop()    |
+//         `-------------> [ Ended ] ---------------------'
 //                                                        ^  SetError()
 //                                                        |
 //                                         [ Any State Other Than InitXXX ]
 
 //
 // Initialization is a series of state transitions from "Created" through each
 // filter initialization state.  When all filter initialization states have
 // completed, we are implicitly in a "Paused" state.  At that point we simulate
 // a Seek() to the beginning of the media to give filters a chance to preroll.
 // From then on the normal Seek() transitions are carried out and we start
@@ skipping 143 matching lines @@
     kInitDemuxer,
     kInitAudioDecoder,
     kInitAudioRenderer,
     kInitVideoDecoder,
     kInitVideoRenderer,
     kPausing,
     kSeeking,
     kFlushing,
     kStarting,
     kStarted,
+    kEnded,
     kStopping,
     kStopped,
     kError,
   };
 
   // Updates |state_|. All state transitions should use this call.
   void SetState(State next_state);
 
   // Simple method used to make sure the pipeline is running normally.
   bool IsPipelineOk();
@@ skipping 299 matching lines @@
   base::Time creation_time_;
 
   scoped_ptr<SerialRunner> pending_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(Pipeline);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_PIPELINE_H_