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

media/base/pipeline.h

Index: media/base/pipeline.h
diff --git a/media/base/pipeline.h b/media/base/pipeline.h
index 1d50f04e6495d49fb64c2f9742d04970905eadba..9dfbf556224b56ca1f3844a93290edfd5a9c3ecf 100644
--- a/media/base/pipeline.h
+++ b/media/base/pipeline.h
@@ -80,9 +80,6 @@ class MEDIA_EXPORT PipelineStatusNotification {
 //         |                                              |
 //         V      Seek()/Stop()                           |
 //   [ Started ] -------------------------> [ Pausing (for each filter) ]
-//         |                                              ^
-//         |   OnRendererEnded()             Seek()/Stop()    |
-//         `-------------> [ Ended ] ---------------------'
 //                                                        ^  SetError()
 //                                                        |
 //                                         [ Any State Other Than InitXXX ]
@@ -246,7 +243,6 @@ class MEDIA_EXPORT Pipeline
     kFlushing,
     kStarting,
     kStarted,
-    kEnded,
     kStopping,
     kStopped,
     kError,