Move media/audio files into media namespace

media/audio/fake_audio_output_stream.cc

Index: media/audio/fake_audio_output_stream.cc
diff --git a/media/audio/fake_audio_output_stream.cc b/media/audio/fake_audio_output_stream.cc
index 14a38cd0c0993602b46743d5da09d5d13560dcc9..686ccdef1a82462ebbcf3b2d913325e6d33c0f66 100644
--- a/media/audio/fake_audio_output_stream.cc
+++ b/media/audio/fake_audio_output_stream.cc
@@ -8,6 +8,8 @@
 #include "base/logging.h"
 #include "media/audio/audio_manager_base.h"
 
+namespace media {
+
 FakeAudioOutputStream* FakeAudioOutputStream::current_fake_stream_ = NULL;
 
 // static
@@ -70,3 +72,5 @@ FakeAudioOutputStream::~FakeAudioOutputStream() {
   if (current_fake_stream_ == this)
     current_fake_stream_ = NULL;
 }
+
+}  // namespace media