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

native_client_sdk/src/libraries/nacl_io/pepper_interface.h

Index: native_client_sdk/src/libraries/nacl_io/pepper_interface.h
diff --git a/native_client_sdk/src/libraries/nacl_io/pepper_interface.h b/native_client_sdk/src/libraries/nacl_io/pepper_interface.h
index edeb0367b058cb7d81a29ed7d4a2f04635e2a53e..a78e6003ef6fba98c26fbb195ff875ce7b3e8151 100644
--- a/native_client_sdk/src/libraries/nacl_io/pepper_interface.h
+++ b/native_client_sdk/src/libraries/nacl_io/pepper_interface.h
@@ -33,12 +33,12 @@
 
 
 // Forward declare interface classes.
+#include "nacl_io/pepper/undef_macros.h"
 #include "nacl_io/pepper/define_empty_macros.h"
 #undef BEGIN_INTERFACE
 #define BEGIN_INTERFACE(BaseClass, PPInterface, InterfaceString) \
     class BaseClass;
 #include "nacl_io/pepper/all_interfaces.h"
-#include "nacl_io/pepper/undef_macros.h"
 
 int PPErrorToErrno(int32_t err);
 
@@ -50,15 +50,16 @@ class PepperInterface {
   virtual void ReleaseResource(PP_Resource) = 0;
 
 // Interface getters.
+#include "nacl_io/pepper/undef_macros.h"
 #include "nacl_io/pepper/define_empty_macros.h"
 #undef BEGIN_INTERFACE
 #define BEGIN_INTERFACE(BaseClass, PPInterface, InterfaceString) \
     virtual BaseClass* Get##BaseClass() = 0;
 #include "nacl_io/pepper/all_interfaces.h"
-#include "nacl_io/pepper/undef_macros.h"
 };
 
 // Interface class definitions.
+#include "nacl_io/pepper/undef_macros.h"
 #define BEGIN_INTERFACE(BaseClass, PPInterface, InterfaceString) \
     class BaseClass { \
      public: \
@@ -77,7 +78,6 @@ class PepperInterface {
                 Type4) \
     virtual ReturnType MethodName(Type0, Type1, Type2, Type3, Type4) = 0;
 #include "nacl_io/pepper/all_interfaces.h"
-#include "nacl_io/pepper/undef_macros.h"
 
 
 class ScopedResource {