De-Client Surface interface

services/native_viewport/viewport_surface.h

Index: services/native_viewport/viewport_surface.h
diff --git a/services/native_viewport/viewport_surface.h b/services/native_viewport/viewport_surface.h
index d5e691ce1cd280a7266922ccb8057b4dcb1c522c..a96480fac778ad3faad4ce94a52e0a2019e47dc7 100644
--- a/services/native_viewport/viewport_surface.h
+++ b/services/native_viewport/viewport_surface.h
@@ -16,13 +16,13 @@
 namespace native_viewport {
 
 // This manages the surface that draws to a particular NativeViewport instance.
-class ViewportSurface : public mojo::SurfaceClient {
+class ViewportSurface {
  public:
   ViewportSurface(mojo::SurfacePtr surface,
                   mojo::Gpu* gpu_service,
                   const gfx::Size& size,
                   cc::SurfaceId child_id);
-  ~ViewportSurface() override;
+  ~ViewportSurface();
 
   void SetWidgetId(uint64_t widget_id);
   void SetSize(const gfx::Size& size);
@@ -32,11 +32,6 @@ class ViewportSurface : public mojo::SurfaceClient {
   void BindSurfaceToNativeViewport();
   void SubmitFrame();
 
-  // SurfaceClient implementation.
-  void SetIdNamespace(uint32_t id_namespace) override;
-  void ReturnResources(
-      mojo::Array<mojo::ReturnedResourcePtr> resources) override;
-
   mojo::SurfacePtr surface_;
   mojo::Gpu* gpu_service_;
   uint64_t widget_id_;