Modify ALLOW_UNUSED to allow enabling unused local warnings on MSVC.

base/mac/foundation_util_unittest.mm

 // 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 "base/mac/foundation_util.h"
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/format_macros.h"
@@ skipping 313 matching lines @@
   // pointer incompatibility to validate this at compilation.
 #if defined(ARCH_CPU_64_BITS)
   typedef long FormatNSIntegerAsType;
   typedef unsigned long FormatNSUIntegerAsType;
 #else
   typedef int FormatNSIntegerAsType;
   typedef unsigned int FormatNSUIntegerAsType;
 #endif  // defined(ARCH_CPU_64_BITS)
 
   NSInteger some_nsinteger;
-  FormatNSIntegerAsType* pointer_to_some_nsinteger ALLOW_UNUSED =
-      &some_nsinteger;
+  FormatNSIntegerAsType* pointer_to_some_nsinteger = &some_nsinteger;
+  ALLOW_UNUSED_LOCAL(pointer_to_some_nsinteger);
 
   NSUInteger some_nsuinteger;
-  FormatNSUIntegerAsType* pointer_to_some_nsuinteger ALLOW_UNUSED =
-      &some_nsuinteger;
+  FormatNSUIntegerAsType* pointer_to_some_nsuinteger = &some_nsuinteger;
+  ALLOW_UNUSED_LOCAL(pointer_to_some_nsuinteger);
 
   // Check that format specifier works correctly for NSInteger.
   const struct {
     NSInteger value;
     const char* expected;
     const char* expected_hex;
   } nsinteger_cases[] = {
 #if !defined(ARCH_CPU_64_BITS)
     {12345678, "12345678", "bc614e"},
     {-12345678, "-12345678", "ff439eb2"},
@@ skipping 32 matching lines @@
   for (size_t i = 0; i < arraysize(nsuinteger_cases); ++i) {
     EXPECT_EQ(nsuinteger_cases[i].expected,
               StringPrintf("%" PRIuNS, nsuinteger_cases[i].value));
     EXPECT_EQ(nsuinteger_cases[i].expected_hex,
               StringPrintf("%" PRIxNS, nsuinteger_cases[i].value));
   }
 }
 
 }  // namespace mac
 }  // namespace base