Add a block based Audio FIFO.

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index 77f17a189d9856f2c31f371d3fc0ebf7c1dfb179..6be08b96e536b340cecb3eceda23bf1cf5a78039 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -206,13 +206,15 @@
         'base/android/media_player_manager.h',
         'base/android/media_resource_getter.cc',
         'base/android/media_resource_getter.h',
+        'base/audio_block_fifo.cc',
+        'base/audio_block_fifo.h',
         'base/audio_buffer.cc',
         'base/audio_buffer.h',
         'base/audio_buffer_queue.cc',
         'base/audio_buffer_queue.h',
-        'base/audio_capturer_source.h',
         'base/audio_buffer_converter.cc',
         'base/audio_buffer_converter.h',
+        'base/audio_capturer_source.h',
         'base/audio_converter.cc',
         'base/audio_converter.h',
         'base/audio_decoder.cc',
@@ -1059,6 +1061,7 @@
         'base/android/media_codec_bridge_unittest.cc',
         'base/android/media_drm_bridge_unittest.cc',
         'base/android/media_source_player_unittest.cc',
+        'base/audio_block_fifo_unittest.cc',
         'base/audio_buffer_converter_unittest.cc',
         'base/audio_buffer_unittest.cc',
         'base/audio_buffer_queue_unittest.cc',