Make PipelineImpl state change tasks consistent.

media/base/pipeline_impl_unittest.cc

 // 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.
 
 #include "media/base/pipeline_impl.h"
 
 #include <stddef.h>
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 880 matching lines @@
     SetDemuxerExpectations(&streams, base::TimeDelta::FromSeconds(3000));
 
     EXPECT_CALL(*renderer_, HasAudio()).WillRepeatedly(Return(true));
     EXPECT_CALL(*renderer_, HasVideo()).WillRepeatedly(Return(true));
 
     if (state == kInitRenderer) {
       if (stop_or_error == kStop) {
         EXPECT_CALL(*renderer_, Initialize(_, _, _))
             .WillOnce(
                 DoAll(Stop(pipeline_.get()), PostCallback<2>(PIPELINE_OK)));
-        // Note: OnStart or OnMetadata callback are not called
-        // after pipeline is stopped.
+        // Note: OnStart is not callback after pipeline is stopped.
       } else {
         EXPECT_CALL(*renderer_, Initialize(_, _, _))
             .WillOnce(PostCallback<2>(PIPELINE_ERROR_INITIALIZATION_FAILED));
-        EXPECT_CALL(callbacks_, OnMetadata(_));
         EXPECT_CALL(callbacks_, OnStart(PIPELINE_ERROR_INITIALIZATION_FAILED));
       }
 
+      EXPECT_CALL(callbacks_, OnMetadata(_));
       EXPECT_CALL(*demuxer_, Stop());
       return;
     }
 
     EXPECT_CALL(*renderer_, Initialize(_, _, _))
         .WillOnce(
             DoAll(SaveArg<1>(&renderer_client_), PostCallback<2>(PIPELINE_OK)));
 
     // If we get here it's a successful initialization.
     EXPECT_CALL(callbacks_, OnStart(PIPELINE_OK));
@@ skipping 155 matching lines @@
 INSTANTIATE_TEARDOWN_TEST(Error, Seeking);
 INSTANTIATE_TEARDOWN_TEST(Error, Playing);
 INSTANTIATE_TEARDOWN_TEST(Error, Suspending);
 INSTANTIATE_TEARDOWN_TEST(Error, Suspended);
 INSTANTIATE_TEARDOWN_TEST(Error, Resuming);
 
 INSTANTIATE_TEARDOWN_TEST(ErrorAndStop, Playing);
 INSTANTIATE_TEARDOWN_TEST(ErrorAndStop, Suspended);
 
 }  // namespace media