Make a global enum to differentiate impl & proxy.

webkit/plugins/ppapi/ppb_file_ref_impl.cc

Index: webkit/plugins/ppapi/ppb_file_ref_impl.cc
diff --git a/webkit/plugins/ppapi/ppb_file_ref_impl.cc b/webkit/plugins/ppapi/ppb_file_ref_impl.cc
index 4e9abc5d354dac265bc8f6434b3c553af9282617..c065c00dbb66af49a5ce51077a95f19eb4896cda 100644
--- a/webkit/plugins/ppapi/ppb_file_ref_impl.cc
+++ b/webkit/plugins/ppapi/ppb_file_ref_impl.cc
@@ -80,14 +80,14 @@ std::string GetNameForVirtualFilePath(const std::string& path) {
 
 PPB_FileRef_Impl::PPB_FileRef_Impl(const PPB_FileRef_CreateInfo& info,
                                    PPB_FileSystem_Impl* file_system)
-    : PPB_FileRef_Shared(PPB_FileRef_Shared::InitAsImpl(), info),
+    : PPB_FileRef_Shared(::ppapi::OBJECT_IS_IMPL, info),
       file_system_(file_system),
       external_file_system_path_() {
 }
 
 PPB_FileRef_Impl::PPB_FileRef_Impl(const PPB_FileRef_CreateInfo& info,
                                    const FilePath& external_file_path)
-    : PPB_FileRef_Shared(PPB_FileRef_Shared::InitAsImpl(), info),
+    : PPB_FileRef_Shared(::ppapi::OBJECT_IS_IMPL, info),
       file_system_(),
       external_file_system_path_(external_file_path) {
 }