Pass Connector* into MojoMediaClient::Initialize().

media/mojo/interfaces/media_service.mojom

Index: media/mojo/interfaces/media_service.mojom
diff --git a/media/mojo/interfaces/media_service.mojom b/media/mojo/interfaces/media_service.mojom
index 3acfa3aef67c7dc1e375e76c3079a7250e642fec..eda5af86c18fe6432b499e4744b3f3b03d388ba0 100644
--- a/media/mojo/interfaces/media_service.mojom
+++ b/media/mojo/interfaces/media_service.mojom
@@ -8,6 +8,10 @@ import "media/mojo/interfaces/interface_factory.mojom";
 import "services/service_manager/public/interfaces/interface_provider.mojom";
 
 interface MediaService {
-  CreateInterfaceFactory(InterfaceFactory& factory,
-                       service_manager.mojom.InterfaceProvider frame_interfaces);
+  // Requests an InterfaceFactory. |host_interfaces| can optionally be used to
+  // provide interfaces hosted by the caller to the remote InterfaceFactory
+  // implementation.
+  CreateInterfaceFactory(
+      InterfaceFactory& factory,
+      service_manager.mojom.InterfaceProvider? host_interfaces);
 };