Load CMA backend from shared library

chromecast/media/cma/backend/media_clock_device.cc

Index: chromecast/media/cma/backend/media_clock_device.cc
diff --git a/chromecast/media/cma/backend/media_clock_device.cc b/chromecast/media/cma/backend/media_clock_device.cc
deleted file mode 100644
index 853e5bafbd0cdd1ae12575a517371700e0c5f4c4..0000000000000000000000000000000000000000
--- a/chromecast/media/cma/backend/media_clock_device.cc
+++ /dev/null
@@ -1,55 +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/media_clock_device.h"
-
-#include "base/logging.h"
-
-namespace chromecast {
-namespace media {
-
-MediaClockDevice::MediaClockDevice() {
-}
-
-MediaClockDevice::~MediaClockDevice() {
-}
-
-// static
-bool MediaClockDevice::IsValidStateTransition(State state1, State state2) {
-  if (state2 == state1)
-    return true;
-
-  // All states can transition to |kStateError|.
-  bool is_transition_valid = (state2 == kStateError);
-
-  // All the other valid FSM transitions.
-  is_transition_valid = is_transition_valid ||
-      (state1 == kStateUninitialized && (state2 == kStateIdle)) ||
-      (state1 == kStateIdle && (state2 == kStateRunning ||
-                                state2 == kStateUninitialized)) ||
-      (state1 == kStateRunning && (state2 == kStateIdle)) ||
-      (state1 == kStateError && (state2 == kStateUninitialized));
-
-  return is_transition_valid;
-}
-
-// static
-std::string MediaClockDevice::StateToString(const State& state) {
-  switch (state) {
-    case kStateUninitialized:
-      return "Uninitialized";
-    case kStateIdle:
-      return "Idle";
-    case kStateRunning:
-      return "Running";
-    case kStateError:
-      return "Error";
-    default:
-      NOTREACHED() << "Unknown MediaClockDevice::State: " << state;
-      return "";
-  }
-}
-
-}  // namespace media
-}  // namespace chromecast