Made MessagePump a non-thread safe class.

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 671 matching lines @@
 
 // Invoked function OnError. This asserts that the pipeline does not enqueue
 // non-teardown related tasks while tearing down.
 static void TestNoCallsAfterError(
     Pipeline* pipeline, base::MessageLoop* message_loop,
     PipelineStatus /* status */) {
   CHECK(pipeline);
   CHECK(message_loop);
 
   // When we get to this stage, the message loop should be empty.
-  message_loop->AssertIdle();
+  EXPECT_TRUE(message_loop->IsIdleForTesting());
 
   // Make calls on pipeline after error has occurred.
   pipeline->SetPlaybackRate(0.5f);
   pipeline->SetVolume(0.5f);
 
   // No additional tasks should be queued as a result of these calls.
-  message_loop->AssertIdle();
+  EXPECT_TRUE(message_loop->IsIdleForTesting());
 }
 
 TEST_F(PipelineTest, NoMessageDuringTearDownFromError) {
   CreateAudioStream();
   MockDemuxerStreamVector streams;
   streams.push_back(audio_stream());
 
   InitializeDemuxer(&streams);
   InitializeAudioRenderer(audio_stream(), false);
   InitializePipeline(PIPELINE_OK);
@@ skipping 460 matching lines @@
 INSTANTIATE_TEARDOWN_TEST(Error, InitAudioRenderer);
 INSTANTIATE_TEARDOWN_TEST(Error, InitVideoRenderer);
 INSTANTIATE_TEARDOWN_TEST(Error, Pausing);
 INSTANTIATE_TEARDOWN_TEST(Error, Flushing);
 INSTANTIATE_TEARDOWN_TEST(Error, Seeking);
 INSTANTIATE_TEARDOWN_TEST(Error, Prerolling);
 INSTANTIATE_TEARDOWN_TEST(Error, Starting);
 INSTANTIATE_TEARDOWN_TEST(Error, Playing);
 
 }  // namespace media