Add support for switching the audio output device for HTMLMediaElements.

media/mojo/services/mojo_renderer_service.cc

Index: media/mojo/services/mojo_renderer_service.cc
diff --git a/media/mojo/services/mojo_renderer_service.cc b/media/mojo/services/mojo_renderer_service.cc
index ba81a2127ce5301d57e167cac6e1ef2603db47dc..1f3af64eee5847f78ce0d64f79d8774fd07db243 100644
--- a/media/mojo/services/mojo_renderer_service.cc
+++ b/media/mojo/services/mojo_renderer_service.cc
@@ -103,6 +103,13 @@ void MojoRendererService::SetVolume(float volume) {
   renderer_->SetVolume(volume);
 }
 
+void MojoRendererService::SwitchAudioOutputDevice(
+    const mojo::String& device_id, const mojo::String& security_origin) {
+  renderer_->SwitchAudioOutputDevice(device_id.get(),
+                                     GURL(security_origin.get()).GetOrigin());
+}
+
+
 void MojoRendererService::OnStreamReady(const mojo::Closure& callback) {
   DCHECK_EQ(state_, STATE_INITIALIZING);