Make a global enum to differentiate impl & proxy.

ppapi/shared_impl/ppb_device_ref_shared.cc

Index: ppapi/shared_impl/ppb_device_ref_shared.cc
diff --git a/ppapi/shared_impl/ppb_device_ref_shared.cc b/ppapi/shared_impl/ppb_device_ref_shared.cc
index edd01f2ce9051739f8f9be8cc5b4b6b997f59661..43f758f3b72991cdb85d20dde56395a21b1c905e 100644
--- a/ppapi/shared_impl/ppb_device_ref_shared.cc
+++ b/ppapi/shared_impl/ppb_device_ref_shared.cc
@@ -15,17 +15,10 @@ DeviceRefData::DeviceRefData()
     : type(PP_DEVICETYPE_DEV_INVALID) {
 }
 
-PPB_DeviceRef_Shared::PPB_DeviceRef_Shared(const InitAsImpl&,
+PPB_DeviceRef_Shared::PPB_DeviceRef_Shared(ResourceObjectType type,
                                            PP_Instance instance,
                                            const DeviceRefData& data)
-    : Resource(instance),
-      data_(data) {
-}
-
-PPB_DeviceRef_Shared::PPB_DeviceRef_Shared(const InitAsProxy&,
-                                           PP_Instance instance,
-                                           const DeviceRefData& data)
-    : Resource(HostResource::MakeInstanceOnly(instance)),
+    : Resource(type, instance),
       data_(data) {
 }