Add support for the audio-output-device switching IPC mechanism to the renderer lower layers (media…

content/renderer/media/webrtc_audio_renderer_unittest.cc

Index: content/renderer/media/webrtc_audio_renderer_unittest.cc
diff --git a/content/renderer/media/webrtc_audio_renderer_unittest.cc b/content/renderer/media/webrtc_audio_renderer_unittest.cc
index 06238dc9053f71f31fa4fd173f0df2d91c6e5d00..781df9627c786f6b6f2129030fa2215dff4aa485 100644
--- a/content/renderer/media/webrtc_audio_renderer_unittest.cc
+++ b/content/renderer/media/webrtc_audio_renderer_unittest.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <string>
 #include <vector>
 
 #include "base/single_thread_task_runner.h"
@@ -40,6 +41,10 @@ class MockAudioOutputIPC : public media::AudioOutputIPC {
   MOCK_METHOD0(PauseStream, void());
   MOCK_METHOD0(CloseStream, void());
   MOCK_METHOD1(SetVolume, void(double volume));
+  MOCK_METHOD3(SwitchOutputDevice,
+               void(const std::string& device_id,
+                    const GURL& security_origin,
+                    int request_id));
 };
 
 class FakeAudioOutputDevice
@@ -55,6 +60,13 @@ class FakeAudioOutputDevice
   MOCK_METHOD0(Pause, void());
   MOCK_METHOD0(Play, void());
   MOCK_METHOD1(SetVolume, bool(double volume));
+  MOCK_METHOD0(SwitchOutputDeviceMock, void());
+  void SwitchOutputDevice(
+      const std::string& device_id,
+      const GURL& security_origin,
+      scoped_ptr<media::SwitchOutputDeviceCallbackRunner> callback_runner) {
+    SwitchOutputDeviceMock();
+  }
 
  protected:
   virtual ~FakeAudioOutputDevice() {}