First step towards moving AudioDevice from content/ to media/audio.

content/renderer/pepper/pepper_platform_audio_input_impl.cc

Index: content/renderer/pepper/pepper_platform_audio_input_impl.cc
diff --git a/content/renderer/pepper/pepper_platform_audio_input_impl.cc b/content/renderer/pepper/pepper_platform_audio_input_impl.cc
index effcf2acd112ca650d646ddf510556275ca16739..654197a8ecd8cb6a69230d9ae7d3cf1e9715003f 100644
--- a/content/renderer/pepper/pepper_platform_audio_input_impl.cc
+++ b/content/renderer/pepper/pepper_platform_audio_input_impl.cc
@@ -24,7 +24,7 @@ PepperPlatformAudioInputImpl* PepperPlatformAudioInputImpl::Create(
     int frames_per_buffer,
     webkit::ppapi::PluginDelegate::PlatformAudioInputClient* client) {
   scoped_refptr<PepperPlatformAudioInputImpl> audio_input(
-      new PepperPlatformAudioInputImpl);
+      new PepperPlatformAudioInputImpl());
   if (audio_input->Initialize(plugin_delegate, device_id, sample_rate,
                               frames_per_buffer, client)) {
     // Balanced by Release invoked in
@@ -97,7 +97,9 @@ void PepperPlatformAudioInputImpl::OnStreamCreated(
 
 void PepperPlatformAudioInputImpl::OnVolume(double volume) {}
 
-void PepperPlatformAudioInputImpl::OnStateChanged(AudioStreamState state) {}
+void PepperPlatformAudioInputImpl::OnStateChanged(
+    media::AudioStreamState state) {
+}
 
 void PepperPlatformAudioInputImpl::OnDeviceReady(const std::string& device_id) {
   DCHECK(ChildProcess::current()->io_message_loop_proxy()->