Load CMA backend from shared library

chromecast/media/base/media_codec_support_simple.cc

-// Copyright 2015 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/base/media_codec_support.h"
-
-#include "base/bind.h"
-
-namespace chromecast {
-namespace media {
-
-// This is a default implementation of GetIsCodecSupportedOnChromecastCB that is
-// going to be used for brandings other than 'Chrome'. Most platforms will want
-// to use their own custom implementations of the IsCodecSupportedCB callback.
-net::IsCodecSupportedCB GetIsCodecSupportedOnChromecastCB() {
-  return base::Bind(&net::DefaultIsCodecSupported);
-}
-
-}  // namespace media
-}  // namespace chromecast
-