Clean up header files.

ui/gfx/render_text_unittest.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/render_text.h"
 
+#include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 
 #include "base/format_macros.h"
 #include "base/i18n/break_iterator.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_split.h"
@@ skipping 3182 matching lines @@
     backend[i]->SetColor(SK_ColorRED);
     test_api.DrawVisualText(&renderer);
 
     renderer.GetTextLogAndReset(&text_log);
     EXPECT_EQ(1u, text_log.size());
     EXPECT_EQ(SK_ColorRED, text_log[0].color);
   }
 }
 
 }  // namespace gfx