Add blink::ServiceRegistry and expose it from LocalFrame and Platform.

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 729c9498d44e9369d194f3a64381af62cc0052e7..b79293203ba575be2393b318f634468e4aa7225a 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -29,6 +29,7 @@
 #include "content/public/common/referrer.h"
 #include "content/public/common/stop_find_action.h"
 #include "content/public/renderer/render_frame.h"
+#include "content/renderer/mojo/blink_service_registry_wrapper.h"
 #include "content/renderer/render_frame_proxy.h"
 #include "content/renderer/renderer_webcookiejar_impl.h"
 #include "ipc/ipc_message.h"
@@ -1156,6 +1157,7 @@ class CONTENT_EXPORT RenderFrameImpl
   PresentationDispatcher* presentation_dispatcher_;
 
   ServiceRegistryImpl service_registry_;
+  BlinkServiceRegistryWrapper blink_service_registry_wrapper_;
 
   // The shell proxy used to connect to Mojo applications.
   mojo::shell::mojom::ConnectorPtr connector_;