Switch to standard integer types in tools/.

tools/gn/pattern_unittest.cc

 // Copyright (c) 2013 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 <stddef.h>
+
+#include "base/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/gn/pattern.h"
 
 namespace {
 
 struct Case {
   const char* pattern;
   const char* candidate;
   bool expected_match;
 };
@@ skipping 37 matching lines @@
     { "*\\bfoo\\b*", "lala/foo/bar/baz", true },
   };
   for (size_t i = 0; i < arraysize(pattern_cases); i++) {
     const Case& c = pattern_cases[i];
     Pattern pattern(c.pattern);
     bool result = pattern.MatchesString(c.candidate);
     EXPECT_EQ(c.expected_match, result) << i << ": \"" << c.pattern
         << "\", \"" << c.candidate << "\"";
   }
 }