Use 2 buffers on presumable good Windows boxes.

media/audio/audio_output_controller_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 "base/bind.h"
 #include "base/environment.h"
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/synchronization/waitable_event.h"
@@ skipping 178 matching lines @@
   EXPECT_CALL(event_handler, OnPlaying(NotNull()))
       .WillOnce(InvokeWithoutArgs(&play_event, &base::WaitableEvent::Signal));
 
   // OnPaused() should never be called since the pause during kStarting is
   // dropped when the second play comes in.
   EXPECT_CALL(event_handler, OnPaused(NotNull()))
       .Times(0);
 
   MockAudioOutputControllerSyncReader sync_reader;
   EXPECT_CALL(sync_reader, UpdatePendingBytes(_))
-      .Times(AtLeast(2));
+      .Times(AtLeast(1));
   EXPECT_CALL(sync_reader, Read(_, kHardwareBufferSize))
       .WillRepeatedly(DoAll(SignalEvent(&event), Return(4)));
   EXPECT_CALL(sync_reader, DataReady())
       .WillRepeatedly(Return(true));
   EXPECT_CALL(sync_reader, Close());
 
   AudioParameters params(AudioParameters::AUDIO_PCM_LINEAR, kChannelLayout,
                          kSampleRate, kBitsPerSample, kSamplesPerPacket);
   scoped_refptr<AudioOutputController> controller =
       AudioOutputController::Create(
           audio_manager.get(), &event_handler, params, &sync_reader);
   ASSERT_TRUE(controller.get());
 
   // Wait for OnCreated() to be called.
   event.Wait();
 
   ASSERT_FALSE(play_event.IsSignaled());
   controller->Play();
   controller->Pause();
   controller->Play();
   play_event.Wait();
 
   // Now stop the controller.
   CloseAudioController(controller);
 }
 
 }  // namespace media