Make a global enum to differentiate impl & proxy.

ppapi/shared_impl/ppb_file_ref_shared.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PPAPI_SHARED_IMPL_PPB_FILE_REF_SHARED_H_
 #define PPAPI_SHARED_IMPL_PPB_FILE_REF_SHARED_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 15 matching lines @@
   std::string name;
 };
 
 // This class provides the shared implementation of a FileRef. The functions
 // that actually "do stuff" like Touch and MakeDirectory are implemented
 // differently for the proxied and non-proxied derived classes.
 class PPAPI_SHARED_EXPORT PPB_FileRef_Shared
     : public Resource,
       public thunk::PPB_FileRef_API {
  public:
-  struct InitAsImpl {};
-  struct InitAsProxy {};
-
-  PPB_FileRef_Shared(const InitAsImpl&, const PPB_FileRef_CreateInfo& info);
-  PPB_FileRef_Shared(const InitAsProxy&, const PPB_FileRef_CreateInfo& info);
+  PPB_FileRef_Shared(ResourceObjectType type,
+                     const PPB_FileRef_CreateInfo& info);
   virtual ~PPB_FileRef_Shared();
 
   // Resource overrides.
   virtual thunk::PPB_FileRef_API* AsPPB_FileRef_API() OVERRIDE;
 
   // PPB_FileRef_API implementation (partial).
   virtual PP_FileSystemType GetFileSystemType() const OVERRIDE;
   virtual PP_Var GetName() const OVERRIDE;
   virtual PP_Var GetPath() const OVERRIDE;
   virtual const PPB_FileRef_CreateInfo& GetCreateInfo() const OVERRIDE;
   virtual PP_Var GetAbsolutePath() = 0;
 
  private:
   PPB_FileRef_CreateInfo create_info_;
 
   // Lazily initialized vars created from the create_info_. This is so we can
   // return the identical string object every time they're requested.
   mutable scoped_refptr<StringVar> name_var_;
   mutable scoped_refptr<StringVar> path_var_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(PPB_FileRef_Shared);
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PPB_FILE_REF_SHARED_H_