Defer OSX output stream Start() around system supend and resume.

media/audio/mac/audio_auhal_mac_unittest.cc

 // Copyright 2013 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 "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "media/audio/audio_io.h"
@@ skipping 25 matching lines @@
   MOCK_METHOD3(OnMoreIOData, int(AudioBus* source,
                                  AudioBus* dest,
                                  AudioBuffersState buffers_state));
   MOCK_METHOD1(OnError, void(AudioOutputStream* stream));
 };
 
 class AUHALStreamTest : public testing::Test {
  public:
   AUHALStreamTest()
       : message_loop_(base::MessageLoop::TYPE_UI),
-        manager_(AudioManager::CreateForTesting()) {}
+        manager_(AudioManager::CreateForTesting()) {
+    // Wait for the AudioManager to finish any initialization on the audio loop.
+    base::RunLoop().RunUntilIdle();
+  }
 
   virtual ~AUHALStreamTest() {
     base::RunLoop().RunUntilIdle();
   }
 
   AudioOutputStream* Create() {
     return manager_->MakeAudioOutputStream(
         manager_->GetDefaultOutputStreamParameters(), "", "");
   }
 
@@ skipping 46 matching lines @@
       .WillOnce(DoAll(ZeroBuffer(), SignalEvent(&event), Return(0)));
   EXPECT_CALL(source_, OnError(_)).Times(0);
   stream->Start(&source_);
   event.Wait();
 
   stream->Stop();
   stream->Close();
 }
 
 }  // namespace media