Load CMA backend from shared library

chromecast/media/cma/backend/video_pipeline_device.cc

Index: chromecast/media/cma/backend/video_pipeline_device.cc
diff --git a/chromecast/media/cma/backend/video_pipeline_device.cc b/chromecast/media/cma/backend/video_pipeline_device.cc
deleted file mode 100644
index d00c2cd4afe904e29a56ff23fc8e548214086fdf..0000000000000000000000000000000000000000
--- a/chromecast/media/cma/backend/video_pipeline_device.cc
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chromecast/media/cma/backend/video_pipeline_device.h"
-
-namespace chromecast {
-namespace media {
-
-VideoPipelineDevice::VideoClient::VideoClient() {
-}
-
-VideoPipelineDevice::VideoClient::~VideoClient() {
-}
-
-VideoPipelineDevice::VideoPipelineDevice() {
-}
-
-VideoPipelineDevice::~VideoPipelineDevice() {
-}
-
-}  // namespace media
-}  // namespace chromecast