Load CMA backend from shared library

chromecast/chromecast.gyp

Index: chromecast/chromecast.gyp
diff --git a/chromecast/chromecast.gyp b/chromecast/chromecast.gyp
index 778decdf64bca7c5a120e4a3fc7845555170e910..bfd1ac3ff521c4d8798b791367b72de586be4932 100644
--- a/chromecast/chromecast.gyp
+++ b/chromecast/chromecast.gyp
@@ -43,11 +43,23 @@
         'public/chromecast_export.h',
         'public/graphics_properties_shlib.h',
         'public/graphics_types.h',
+        'public/media_codec_support.h',
+        'public/media/audio_pipeline_device.h',
+        'public/media/cast_key_system.h',
+        'public/media/decoder_buffer.h',
         'public/media/decoder_config.h',
+        'public/media/decrypt_config.h',
+        'public/media/media_clock_device.h',
+        'public/media/media_component_device.h',
+        'public/media/media_pipeline_backend.h',
+        'public/media/media_pipeline_device_params.h',
         'public/media/stream_id.h',
+        'public/media/video_pipeline_device.h',
         'public/osd_plane.h',
         'public/osd_plane_shlib.h',
         'public/osd_surface.h',
+        'public/task_runner.h',
+        'public/time_delta.h',
         'public/video_plane.h',
       ],
     },
@@ -76,7 +88,11 @@
         'base/process_utils.cc',
         'base/process_utils.h',
         'base/serializers.cc',
-        'base/serializers.h'
+        'base/serializers.h',
+        'base/task_runner_impl.cc',
+        'base/task_runner_impl.h',
+        'base/time_conversions.cc',
+        'base/time_conversions.h',
       ],
       'conditions': [
         ['OS=="android"', {