Move media/audio files into media namespace

media/audio/audio_parameters_unittest.cc

Index: media/audio/audio_parameters_unittest.cc
diff --git a/media/audio/audio_parameters_unittest.cc b/media/audio/audio_parameters_unittest.cc
index bd3334f78a3e5b29f37b0b691affdc4595e9c6a7..1a1140bfd54eee8fa95f5ba2fb0e0624dc33620c 100644
--- a/media/audio/audio_parameters_unittest.cc
+++ b/media/audio/audio_parameters_unittest.cc
@@ -7,6 +7,8 @@
 #include "media/audio/audio_parameters.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+namespace media {
+
 TEST(AudioParameters, Constructor_Default) {
   AudioParameters::Format expected_format = AudioParameters::AUDIO_PCM_LINEAR;
   int expected_bits = 0;
@@ -163,3 +165,5 @@ TEST(AudioParameters, Compare) {
     EXPECT_FALSE(target(values[i], values[i]));
   }
 }
+
+}  // namespace media