Mojo C++ bindings: Generate InterfaceHandle<> instead of InterfacePtr<>.

services/native_viewport/onscreen_context_provider.h

Index: services/native_viewport/onscreen_context_provider.h
diff --git a/services/native_viewport/onscreen_context_provider.h b/services/native_viewport/onscreen_context_provider.h
index cb23d9a8d88cc5697dbf57b765d3a79f3e8bf838..e2d5076a1e109f06c0cf3f8bf82c7de076c30990 100644
--- a/services/native_viewport/onscreen_context_provider.h
+++ b/services/native_viewport/onscreen_context_provider.h
@@ -33,7 +33,8 @@ class OnscreenContextProvider : public mojo::ContextProvider,
   };
  private:
   // mojo::ContextProvider implementation:
-  void Create(mojo::ViewportParameterListenerPtr viewport_parameter_listener,
+  void Create(mojo::InterfaceHandle<mojo::ViewportParameterListener>
+                  viewport_parameter_listener,
               const CreateCallback& callback) override;
 
   // gles2::CommandBufferImpl::Observer implementation: