Make a global enum to differentiate impl & proxy.

ppapi/shared_impl/ppb_view_shared.cc

Index: ppapi/shared_impl/ppb_view_shared.cc
diff --git a/ppapi/shared_impl/ppb_view_shared.cc b/ppapi/shared_impl/ppb_view_shared.cc
index 8b2f339400491d7bbf0957e9df461016746dc0aa..60f1dc4e6318f2607d17fb90cb984d1260c6b2aa 100644
--- a/ppapi/shared_impl/ppb_view_shared.cc
+++ b/ppapi/shared_impl/ppb_view_shared.cc
@@ -27,17 +27,10 @@ bool ViewData::Equals(const ViewData& other) const {
          clip_rect.size.height == other.clip_rect.size.height;
 }
 
-PPB_View_Shared::PPB_View_Shared(const InitAsImpl&,
+PPB_View_Shared::PPB_View_Shared(ResourceObjectType type,
                                  PP_Instance instance,
                                  const ViewData& data)
-    : Resource(instance),
-      data_(data) {
-}
-
-PPB_View_Shared::PPB_View_Shared(const InitAsProxy&,
-                                 PP_Instance instance,
-                                 const ViewData& data)
-    : Resource(HostResource::MakeInstanceOnly(instance)),
+    : Resource(type, instance),
       data_(data) {
 }