Refactor AudioRendererMixer to be more generic.

media/base/audio_renderer_mixer_input_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/bind_helpers.h"
 #include "media/base/audio_renderer_mixer.h"
 #include "media/base/audio_renderer_mixer_input.h"
 #include "media/base/fake_audio_render_callback.h"
 #include "media/base/mock_audio_renderer_sink.h"
@@ skipping 38 matching lines @@
       mixer_.reset(new AudioRendererMixer(
           audio_parameters_, audio_parameters_, sink));
     }
     return mixer_.get();
   }
 
   double ProvideInput() {
     return mixer_input_->ProvideInput(audio_bus_.get(), base::TimeDelta());
   }
 
-  int GetAudioDelayMilliseconds() {
-    return mixer_input_->current_audio_delay_milliseconds_;
-  }
-
   MOCK_METHOD1(RemoveMixer, void(const AudioParameters&));
 
  protected:
   virtual ~AudioRendererMixerInputTest() {}
 
   AudioParameters audio_parameters_;
   scoped_ptr<AudioRendererMixer> mixer_;
   scoped_refptr<AudioRendererMixerInput> mixer_input_;
   scoped_ptr<FakeAudioRenderCallback> fake_callback_;
   scoped_ptr<AudioBus> audio_bus_;
@@ skipping 34 matching lines @@
 TEST_F(AudioRendererMixerInputTest, StopBeforeInitializeOrStart) {
   // |mixer_input_| was initialized during construction.
   mixer_input_->Stop();
 
   // Verify Stop() works without Initialize() or Start().
   CreateMixerInput();
   mixer_input_->Stop();
 }
 
 }  // namespace media