Clean up header files.

ui/gfx/platform_font_win.cc

 // 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 "ui/gfx/platform_font_win.h"
 
 #include <windows.h>
 #include <dwrite.h>
+#include <limits.h>
 #include <math.h>
 #include <stdint.h>
 #include <wchar.h>
 
 #include <algorithm>
 
 #include "base/debug/alias.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
@@ skipping 704 matching lines @@
   return new PlatformFontWin(native_font);
 }
 
 // static
 PlatformFont* PlatformFont::CreateFromNameAndSize(const std::string& font_name,
                                                   int font_size) {
   return new PlatformFontWin(font_name, font_size);
 }
 
 }  // namespace gfx