media: Add ProvisionFetcher mojo interface and implementation.

media/mojo/services/mojo_media_client.h

Index: media/mojo/services/mojo_media_client.h
diff --git a/media/mojo/services/mojo_media_client.h b/media/mojo/services/mojo_media_client.h
index 1cd41302b511b537f44d7158a53793bef88a8925..88acb3061d653e228d6f99cdbb96732f099187aa 100644
--- a/media/mojo/services/mojo_media_client.h
+++ b/media/mojo/services/mojo_media_client.h
@@ -17,6 +17,10 @@
 #include "media/base/video_decoder.h"
 #include "media/base/video_renderer_sink.h"
 
+namespace mojo {
+class ServiceProvider;
+}
+
 namespace media {
 
 // Interface class which clients will extend to override (at compile time) the
@@ -53,7 +57,8 @@ class PlatformMojoMediaClient {
   virtual const AudioHardwareConfig* GetAudioHardwareConfig();
 
   // Returns the CdmFactory to be used by MojoCdmService.
-  virtual scoped_ptr<CdmFactory> CreateCdmFactory();
+  virtual scoped_ptr<CdmFactory> CreateCdmFactory(
+      mojo::ServiceProvider* service_provider);
 };
 
 class MojoMediaClient {
@@ -75,7 +80,8 @@ class MojoMediaClient {
   scoped_ptr<VideoRendererSink> CreateVideoRendererSink(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
   const AudioHardwareConfig* GetAudioHardwareConfig();
-  scoped_ptr<CdmFactory> CreateCdmFactory();
+  scoped_ptr<CdmFactory> CreateCdmFactory(
+      mojo::ServiceProvider* service_provider);
 
  private:
   friend struct base::DefaultLazyInstanceTraits<MojoMediaClient>;