[Chromecast] Add IPC code on brower process side

chromecast/browser/media/cma_message_loop.cc

Index: chromecast/browser/media/cma_message_loop.cc
diff --git a/chromecast/browser/media/cma_message_loop.cc b/chromecast/browser/media/cma_message_loop.cc
new file mode 100644
index 0000000000000000000000000000000000000000..98b2d9580ce25dc23b926441ff9700df3d23bca8
--- /dev/null
+++ b/chromecast/browser/media/cma_message_loop.cc
@@ -0,0 +1,32 @@
+// 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/browser/media/cma_message_loop.h"
+
+#include "base/threading/thread.h"
+
+namespace chromecast {
+namespace media {
+
+// static
+scoped_refptr<base::MessageLoopProxy> CmaMessageLoop::GetMessageLoopProxy() {
+  return GetInstance()->thread_->message_loop_proxy();
+}
+
+// static
+CmaMessageLoop* CmaMessageLoop::GetInstance() {
+  return Singleton<CmaMessageLoop>::get();
+}
+
+CmaMessageLoop::CmaMessageLoop()
+  : thread_(new base::Thread("CmaThread")) {
+  thread_->Start();
+}
+
+CmaMessageLoop::~CmaMessageLoop() {
+  // This will automatically shutdown the thread.
+}
+
+}  // namespace media
+}  // namespace chromecast