Media Remoting: Add RemotingController.

media/remoting/remoting_renderer_factory.cc

+// Copyright 2016 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 "media/remoting/remoting_renderer_factory.h"
+
+#include "base/logging.h"
+
+namespace media {
+
+RemotingRendererFactory::RemotingRendererFactory(
+    std::unique_ptr<RendererFactory> default_renderer_factory,
+    std::unique_ptr<RemotingController> remoting_controller)
+    : default_renderer_factory_(std::move(default_renderer_factory)),
+      remoting_controller_(std::move(remoting_controller)) {}
+
+RemotingRendererFactory::~RemotingRendererFactory() {}
+
+std::unique_ptr<Renderer> RemotingRendererFactory::CreateRenderer(
+    const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
+    const scoped_refptr<base::TaskRunner>& worker_task_runner,
+    AudioRendererSink* audio_renderer_sink,
+    VideoRendererSink* video_renderer_sink,
+    const RequestSurfaceCB& request_surface_cb) {
+  if (remoting_controller_ && remoting_controller_->is_remoting()) {
+    VLOG(1) << "Create Remoting renderer.";
+    // TODO(xjz): Merge this with Eric's implementation.
+    NOTIMPLEMENTED();
+    return std::unique_ptr<Renderer>();

[xhwang, 2016/10/01 07:12:15]

If you check in this code today will this cause trouble? We assume
CreateRenderer() never returns a nullptr:

https://cs.chromium.org/chromium/src/media/filters/pipeline_controller.cc?rcl...
https://cs.chromium.org/chromium/src/media/base/pipeline_impl.cc?rcl=14752632...

[xjz, 2016/10/03 22:31:09]

This will be never executed before we integrated all the changes. And this will
not return a nullptr after the integration.

+  } else {
+    VLOG(1) << "Create Local playback renderer.";
+    return default_renderer_factory_->CreateRenderer(
+        media_task_runner, worker_task_runner, audio_renderer_sink,
+        video_renderer_sink, request_surface_cb);
+  }
+}
+
+}  // namespace media