Load CMA backend from shared library

chromecast/media/cma/pipeline/av_pipeline_impl.h

Index: chromecast/media/cma/pipeline/av_pipeline_impl.h
diff --git a/chromecast/media/cma/pipeline/av_pipeline_impl.h b/chromecast/media/cma/pipeline/av_pipeline_impl.h
index 70395fc95d65fd845bf079cb249e2f12a8a0dadc..18e0cb8888471a559dace7936ab11be3537d6817 100644
--- a/chromecast/media/cma/pipeline/av_pipeline_impl.h
+++ b/chromecast/media/cma/pipeline/av_pipeline_impl.h
@@ -12,8 +12,8 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread_checker.h"
-#include "chromecast/media/cma/backend/media_component_device.h"
 #include "chromecast/media/cma/pipeline/av_pipeline_client.h"
+#include "chromecast/public/media/media_component_device.h"
 #include "chromecast/public/media/stream_id.h"
 
 namespace media {
@@ -131,8 +131,8 @@ class AvPipelineImpl {
   // |buffered_time_| is the maximum timestamp of buffered frames.
   // |playable_buffered_time_| is the maximum timestamp of buffered and
   // playable frames (i.e. the key id is available for those frames).
-  base::TimeDelta buffered_time_;
-  base::TimeDelta playable_buffered_time_;
+  TimeDelta buffered_time_;
+  TimeDelta playable_buffered_time_;
 
   // List of frames buffered but not playable right away due to a missing
   // key id.