Make a global enum to differentiate impl & proxy.

ppapi/shared_impl/ppb_resource_array_shared.h

 // Copyright (c) 2012 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_RESOURCE_ARRAY_SHARED_H_
 #define PPAPI_SHARED_IMPL_PPB_RESOURCE_ARRAY_SHARED_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/thunk/ppb_resource_array_api.h"
 
 namespace ppapi {
 
 class PPAPI_SHARED_EXPORT PPB_ResourceArray_Shared
     : public Resource,
       public thunk::PPB_ResourceArray_API {
  public:
-  struct InitAsImpl {};
-  struct InitAsProxy {};
-
-  // The dummy arguments control which version of Resource's constructor is
-  // called for this base class.
-  PPB_ResourceArray_Shared(const InitAsImpl&,
+  PPB_ResourceArray_Shared(ResourceObjectType type,
                            PP_Instance instance,
                            const PP_Resource elements[],
                            uint32_t size);
-  PPB_ResourceArray_Shared(const InitAsProxy&,
-                           PP_Instance instance,
-                           const PP_Resource elements[],
-                           uint32_t size);
-
   virtual ~PPB_ResourceArray_Shared();
 
   // Resource overrides.
   virtual PPB_ResourceArray_API* AsPPB_ResourceArray_API() OVERRIDE;
 
   // PPB_ResourceArray_API implementation.
   virtual uint32_t GetSize() OVERRIDE;
   virtual PP_Resource GetAt(uint32_t index) OVERRIDE;
 
  private:
-  void Initialize(const PP_Resource elements[], uint32_t size);
-
   std::vector<PP_Resource> resources_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(PPB_ResourceArray_Shared);
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PPB_RESOURCE_ARRAY_SHARED_H_