Introduce AudioHardwareConfig for renderer side audio device info.

content/renderer/media/audio_renderer_mixer_manager_unittest.cc

Index: content/renderer/media/audio_renderer_mixer_manager_unittest.cc
diff --git a/content/renderer/media/audio_renderer_mixer_manager_unittest.cc b/content/renderer/media/audio_renderer_mixer_manager_unittest.cc
index 46e78f3f7f5b75ba464ae9f553d813d8f242357b..a9dcba65d8af300abad4960c9af73f37d7f96eed 100644
--- a/content/renderer/media/audio_renderer_mixer_manager_unittest.cc
+++ b/content/renderer/media/audio_renderer_mixer_manager_unittest.cc
@@ -2,9 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/renderer/media/audio_renderer_mixer_manager.h"
+#include "media/base/audio_hardware_config.h"
 #include "media/base/audio_renderer_mixer.h"
 #include "media/base/audio_renderer_mixer_input.h"
 #include "media/base/fake_audio_render_callback.h"
@@ -22,10 +24,29 @@ static const media::ChannelLayout kChannelLayout = media::CHANNEL_LAYOUT_STEREO;
 static const int kRenderViewId = 123;
 static const int kAnotherRenderViewId = 456;
 
+class FakeAudioHardwareConfig : public media::AudioHardwareConfig {
+ public:
+  FakeAudioHardwareConfig() {}
+  virtual ~FakeAudioHardwareConfig() {}
+
+  virtual int GetOutputBufferSize() { return kBufferSize; }
+  virtual int GetOutputSampleRate() { return kSampleRate; }
+
+  virtual int GetInputSampleRate() {
+    NOTIMPLEMENTED();
+    return 0;
+  }
+
+  virtual media::ChannelLayout GetInputChannelLayout() {
+    NOTIMPLEMENTED();
+    return media::CHANNEL_LAYOUT_NONE;
+  }
+};
+
 class AudioRendererMixerManagerTest : public testing::Test {
  public:
   AudioRendererMixerManagerTest() {
-    manager_.reset(new AudioRendererMixerManager(kSampleRate, kBufferSize));
+    manager_.reset(new AudioRendererMixerManager(&fake_config_));
 
     // We don't want to deal with instantiating a real AudioOutputDevice since
     // it's not important to our testing, so we inject a mock.
@@ -49,6 +70,7 @@ class AudioRendererMixerManagerTest : public testing::Test {
   }
 
  protected:
+  FakeAudioHardwareConfig fake_config_;
   scoped_ptr<AudioRendererMixerManager> manager_;
   scoped_refptr<media::MockAudioRendererSink> mock_sink_;