Pipeline: Invalidate weak pointers before returning stop callback.

media/base/pipeline_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 <vector>
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/stl_util.h"
 #include "base/test/simple_test_tick_clock.h"
@@ skipping 297 matching lines @@
                     base::Bind(&CallbackHelper::OnSeek,
                                base::Unretained(&callbacks_)));
 
     // We expect the time to be updated only after the seek has completed.
     EXPECT_NE(seek_time, pipeline_->GetMediaTime());
     message_loop_.RunUntilIdle();
     EXPECT_EQ(seek_time, pipeline_->GetMediaTime());
   }
 
   void DestroyPipeline() {
+    // In real code Pipeline could be destroyed on a different thread. All weak
+    // pointers must have been invalidated before the stop callback returns.
+    DCHECK(!pipeline_->HasWeakPtrsForTesting());
     pipeline_.reset();
   }
 
   void ExpectDemuxerStop() {
     if (demuxer_)
       EXPECT_CALL(*demuxer_, Stop(_)).WillOnce(RunClosure<0>());
   }
 
   void ExpectPipelineStopAndDestroyPipeline() {
     // After the Pipeline is stopped, it could be destroyed any time. Always
@@ skipping 916 matching lines @@
 INSTANTIATE_TEARDOWN_TEST(Error, InitDemuxer);
 INSTANTIATE_TEARDOWN_TEST(Error, InitAudioRenderer);
 INSTANTIATE_TEARDOWN_TEST(Error, InitVideoRenderer);
 INSTANTIATE_TEARDOWN_TEST(Error, Flushing);
 INSTANTIATE_TEARDOWN_TEST(Error, Seeking);
 INSTANTIATE_TEARDOWN_TEST(Error, Playing);
 
 INSTANTIATE_TEARDOWN_TEST(ErrorAndStop, Playing);
 
 }  // namespace media