[NaCl SDK] nacl_io: fix warning of macro redefinition on Windows.

native_client_sdk/src/libraries/nacl_io_test/pepper_interface_mock.cc

 /* 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.
  */
 
 #include "pepper_interface_mock.h"
 
 PepperInterfaceMock::PepperInterfaceMock(PP_Instance instance)
     : instance_(instance),
 
     // Initialize interfaces.
+#include "nacl_io/pepper/undef_macros.h"
 #include "nacl_io/pepper/define_empty_macros.h"
 #undef BEGIN_INTERFACE
 #define BEGIN_INTERFACE(BaseClass, PPInterface, InterfaceString) \
     BaseClass##interface_(new BaseClass##Mock),
 #include "nacl_io/pepper/all_interfaces.h"
-#include "nacl_io/pepper/undef_macros.h"
 
     // Dummy value so we can ensure that no interface ends the initializer list.
     dummy_(0) {
 }
 
 PepperInterfaceMock::~PepperInterfaceMock() {
 
   // Delete interfaces.
+#include "nacl_io/pepper/undef_macros.h"
 #include "nacl_io/pepper/define_empty_macros.h"
 #undef BEGIN_INTERFACE
 #define BEGIN_INTERFACE(BaseClass, PPInterface, InterfaceString) \
     delete BaseClass##interface_;
 #include "nacl_io/pepper/all_interfaces.h"
-#include "nacl_io/pepper/undef_macros.h"
 
 }
 
 PP_Instance PepperInterfaceMock::GetInstance() {
   return instance_;
 }
 
 // Define Getter functions, constructors, destructors.
+#include "nacl_io/pepper/undef_macros.h"
 #include "nacl_io/pepper/define_empty_macros.h"
 #undef BEGIN_INTERFACE
 #define BEGIN_INTERFACE(BaseClass, PPInterface, InterfaceString) \
     BaseClass##Mock* PepperInterfaceMock::Get##BaseClass() { \
       return BaseClass##interface_; \
     } \
     BaseClass##Mock::BaseClass##Mock() { \
     } \
     BaseClass##Mock::~BaseClass##Mock() { \
     }
 #include "nacl_io/pepper/all_interfaces.h"
-#include "nacl_io/pepper/undef_macros.h"