Switch to standard integer types in tools/.

tools/gn/label_pattern_unittest.cc

 // Copyright 2014 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/err.h"
 #include "tools/gn/label_pattern.h"
 #include "tools/gn/value.h"
 
 namespace {
 
 struct PatternCase {
   const char* input;
   bool success;
@@ skipping 49 matching lines @@
         LabelPattern::GetPattern(current_dir, Value(nullptr, cur.input), &err);
 
     EXPECT_EQ(cur.success, !err.has_error()) << i << " " << cur.input;
     EXPECT_EQ(cur.type, result.type()) << i << " " << cur.input;
     EXPECT_EQ(cur.dir, result.dir().value()) << i << " " << cur.input;
     EXPECT_EQ(cur.name, result.name()) << i << " " << cur.input;
     EXPECT_EQ(cur.toolchain, result.toolchain().GetUserVisibleName(false))
         << i << " " << cur.input;
   }
 }