Switch to standard integer types in tools/.

tools/gn/c_include_iterator.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 "tools/gn/c_include_iterator.h"
 
 #include "base/logging.h"
+#include "base/macros.h"
 #include "base/strings/string_util.h"
 #include "tools/gn/input_file.h"
 #include "tools/gn/location.h"
 
 namespace {
 
 enum IncludeType {
   INCLUDE_NONE,
   INCLUDE_SYSTEM,  // #include <...>
   INCLUDE_USER     // #include "..."
@@ skipping 148 matching lines @@
   line_number_++;
 
   *line = file_.substr(begin, offset_ - begin);
   *line_number = line_number_;
 
   // If we didn't hit EOF, skip past the newline for the next one.
   if (offset_ < file_.size())
     offset_++;
   return true;
 }