Add vector_math::FMUL. Replace audio_util::AdjustVolume.

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index 6afd4f5e4bc8d62c7b92b5cd57fc6863228b011e..843f89e053639a4d610d64a323b1e3fe3f9aee72 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -283,8 +283,6 @@
         'base/stream_parser.h',
         'base/stream_parser_buffer.cc',
         'base/stream_parser_buffer.h',
-        'base/vector_math.cc',
-        'base/vector_math.h',
         'base/video_decoder.cc',
         'base/video_decoder.h',
         'base/video_decoder_config.cc',
@@ -551,6 +549,7 @@
             ['include', '^base/audio_bus\\.'],
             ['include', '^base/channel_layout\\.'],
             ['include', '^base/media_stub\\.cc$'],
+            ['include', '^base/vector_math\\.'],
           ],
           'link_settings': {
             'libraries': [
@@ -888,7 +887,6 @@
         'audio/audio_output_proxy_unittest.cc',
         'audio/audio_parameters_unittest.cc',
         'audio/audio_silence_detector_unittest.cc',
-        'audio/audio_util_unittest.cc',
         'audio/cross_process_notification_unittest.cc',
         'audio/fake_audio_consumer_unittest.cc',
         'audio/ios/audio_manager_ios_unittest.cc',
@@ -1264,6 +1262,13 @@
           'sources': [
             '<@(shared_memory_support_sources)',
           ],
+          'conditions': [
+            [ 'target_arch == "ia32" or target_arch == "x64"', {
+              'dependencies': [
+                'media_sse',
+              ],
+            }],
+          ],
         },
         {
           'target_name': 'yuv_convert',