Change mojo geometry structs from using type converters to StructTraits.

services/navigation/navigation_unittest.cc

Index: services/navigation/navigation_unittest.cc
diff --git a/services/navigation/navigation_unittest.cc b/services/navigation/navigation_unittest.cc
index a6a7b0f6b4bf193a3236f1a8b82960635c9ec6aa..ad878ed8bf0fd58a7934b4a9f1d036c1e7da3362 100644
--- a/services/navigation/navigation_unittest.cc
+++ b/services/navigation/navigation_unittest.cc
@@ -49,7 +49,7 @@ class NavigationTest : public shell::test::ShellTest,
   void ViewCreated(mojom::ViewPtr,
                    mojom::ViewClientRequest,
                    bool,
-                   mojo::RectPtr,
+                   const gfx::Rect&,
                    bool) override {}
   void Close() override {}