Introduce media::RendererFactory interface.

media/mojo/services/mojo_renderer_factory.h

+// 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.
+
+#ifndef MEDIA_MOJO_SERVICES_MOJO_RENDERER_FACTORY_H_
+#define MEDIA_MOJO_SERVICES_MOJO_RENDERER_FACTORY_H_
+
+#include "base/memory/ref_counted.h"
+#include "media/base/media_export.h"
+#include "media/base/renderer_factory.h"
+#include "mojo/public/interfaces/application/service_provider.mojom.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}
+
+namespace media {
+
+// The default factory class for creating MojoRendererImpl.
+class MEDIA_EXPORT MojoRendererFactory : public RendererFactory {
+ public:
+  MojoRendererFactory(
+      const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
+      mojo::ServiceProviderPtr renderer_service_provider);
+  ~MojoRendererFactory() final;
+
+  scoped_ptr<Renderer> CreateRenderer(
+      AudioRendererSink* audio_renderer_sink) final;
+
+ private:
+  scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
+  mojo::ServiceProviderPtr renderer_service_provider_;
+
+  DISALLOW_COPY_AND_ASSIGN(MojoRendererFactory);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_MOJO_SERVICES_MOJO_RENDERER_FACTORY_H_