Make PlatformViewport and NativeViewportImpl use Shell* instead of ApplicationImpl*.

services/native_viewport/ozone/platform_viewport_ozone.cc

Index: services/native_viewport/ozone/platform_viewport_ozone.cc
diff --git a/services/native_viewport/ozone/platform_viewport_ozone.cc b/services/native_viewport/ozone/platform_viewport_ozone.cc
index cbed659458ff65b55322f64f51fc1b29bd0eb275..03ca845d2868d0e822cd7ce1e0173179b0609c36 100644
--- a/services/native_viewport/ozone/platform_viewport_ozone.cc
+++ b/services/native_viewport/ozone/platform_viewport_ozone.cc
@@ -124,9 +124,8 @@ class PlatformViewportOzone : public PlatformViewport,
 };
 
 // static
-scoped_ptr<PlatformViewport> PlatformViewport::Create(
-    mojo::ApplicationImpl* application_,
-    Delegate* delegate) {
+scoped_ptr<PlatformViewport> PlatformViewport::Create(mojo::Shell* shell,
+                                                      Delegate* delegate) {
   return scoped_ptr<PlatformViewport>(new PlatformViewportOzone(delegate))
       .Pass();
 }