Mojo: Replace RemotePtr with InterfacePtr and InterfaceImpl

mojo/aura/window_tree_host_mojo.cc

Index: mojo/aura/window_tree_host_mojo.cc
diff --git a/mojo/aura/window_tree_host_mojo.cc b/mojo/aura/window_tree_host_mojo.cc
index b623bbdcd21db20905f0a0098da08a3410ac9df3..9aba1d8af859db89c3f4d1907e2ab3a356056f23 100644
--- a/mojo/aura/window_tree_host_mojo.cc
+++ b/mojo/aura/window_tree_host_mojo.cc
@@ -26,12 +26,14 @@ mojo::ContextFactoryMojo* WindowTreeHostMojo::context_factory_ = NULL;
 // WindowTreeHostMojo, public:
 
 WindowTreeHostMojo::WindowTreeHostMojo(
-    ScopedNativeViewportHandle viewport_handle,
+    NativeViewportPtr viewport,
     const gfx::Rect& bounds,
     const base::Callback<void()>& compositor_created_callback)
-    : native_viewport_(viewport_handle.Pass(), this),
+    : native_viewport_(viewport.Pass()),
       compositor_created_callback_(compositor_created_callback),
       bounds_(bounds) {
+  native_viewport_->SetClient(this);
+
   AllocationScope scope;
   native_viewport_->Create(bounds);