media: Support creation and SetCdm() for mojo based CDM.

media/mojo/services/mojo_renderer_service.h

Index: media/mojo/services/mojo_renderer_service.h
diff --git a/media/mojo/services/mojo_renderer_service.h b/media/mojo/services/mojo_renderer_service.h
index 7ad544b2ea1ae0f0c5a05e0f28effe75afc3c4b5..1b12562fee856a60fa477938cec9a6e533791615 100644
--- a/media/mojo/services/mojo_renderer_service.h
+++ b/media/mojo/services/mojo_renderer_service.h
@@ -24,6 +24,7 @@ namespace media {
 
 class AudioRendererSink;
 class DemuxerStreamProviderShim;
+class MojoCdmServiceContext;
 class MojoDemuxerStreamAdapter;
 class Renderer;
 
@@ -31,17 +32,18 @@ class Renderer;
 // decode and render audio to a sink obtained from the ApplicationConnection.
 class MojoRendererService : public mojo::InterfaceImpl<mojo::MediaRenderer> {
  public:
-  MojoRendererService();
-  ~MojoRendererService() override;
+  explicit MojoRendererService(MojoCdmServiceContext* cdm_service_context);
+  ~MojoRendererService() final;
 
   // mojo::MediaRenderer implementation.
   void Initialize(mojo::DemuxerStreamPtr audio,
                   mojo::DemuxerStreamPtr video,
-                  const mojo::Closure& callback) override;
-  void Flush(const mojo::Closure& callback) override;
-  void StartPlayingFrom(int64_t time_delta_usec) override;
-  void SetPlaybackRate(float playback_rate) override;
-  void SetVolume(float volume) override;
+                  const mojo::Closure& callback) final;
+  void Flush(const mojo::Closure& callback) final;
+  void StartPlayingFrom(int64_t time_delta_usec) final;
+  void SetPlaybackRate(float playback_rate) final;
+  void SetVolume(float volume) final;
+  void SetCdm(int32_t cdm_id, const mojo::Callback<void(bool)>& callback) final;
 
  private:
   enum State {
@@ -82,6 +84,11 @@ class MojoRendererService : public mojo::InterfaceImpl<mojo::MediaRenderer> {
   // Callback executed once Flush() completes.
   void OnFlushCompleted(const mojo::Closure& callback);
 
+  // Callback executed once SetCdm() completes.
+  void OnCdmAttached(const mojo::Callback<void(bool)>& callback, bool success);
+
+  MojoCdmServiceContext* cdm_service_context_;
+
   State state_;
 
   scoped_refptr<AudioRendererSink> audio_renderer_sink_;