Switch to standard integer types in ui/gfx/.

ui/gfx/utf16_indexing.h

 // 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.
 
 #ifndef UI_GFX_UTF16_INDEXING_H_
 #define UI_GFX_UTF16_INDEXING_H_
 
+#include <stddef.h>
+
 #include "base/strings/string16.h"
 #include "ui/gfx/gfx_export.h"
 
 namespace gfx {
 
 // Returns false if s[index-1] is a high surrogate and s[index] is a low
 // surrogate, true otherwise.
 GFX_EXPORT bool IsValidCodePointIndex(const base::string16& s, size_t index);
 
 // |UTF16IndexToOffset| returns the number of code points between |base| and
@@ skipping 22 matching lines @@
 GFX_EXPORT ptrdiff_t UTF16IndexToOffset(const base::string16& s,
                                         size_t base,
                                         size_t pos);
 GFX_EXPORT size_t UTF16OffsetToIndex(const base::string16& s,
                                      size_t base,
                                      ptrdiff_t offset);
 
 }  // namespace gfx
 
 #endif  // UI_GFX_UTF16_INDEXING_H_