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

components/html_viewer/setup.h

Index: components/html_viewer/setup.h
diff --git a/components/html_viewer/setup.h b/components/html_viewer/setup.h
index 15fc26b9cf25ed2b5df10bf01134458067a10a1e..3e906c9b64918c70a5728a5ead7163c4c9e99cfb 100644
--- a/components/html_viewer/setup.h
+++ b/components/html_viewer/setup.h
@@ -67,6 +67,8 @@ class Setup {
     return web_media_player_factory_.get();
   }
 
+  bool enable_mojo_media_renderer() { return enable_mojo_media_renderer_; }
+
  private:
   mojo::ApplicationImpl* app_;
 
@@ -94,6 +96,8 @@ class Setup {
   scoped_ptr<scheduler::RendererScheduler> renderer_scheduler_;
   scoped_ptr<BlinkPlatformImpl> blink_platform_;
   base::Thread compositor_thread_;
+
+  bool enable_mojo_media_renderer_;
   scoped_ptr<WebMediaPlayerFactory> web_media_player_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Setup);