Move a bunch of windows stuff from ui/base/win to ui/gfx/win

ui/gfx/utf16_indexing.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/base/text/utf16_indexing.h"
+#include "ui/gfx/utf16_indexing.h"
 
 #include "base/logging.h"
 #include "base/third_party/icu/icu_utf.h"
 
-namespace ui {
+namespace gfx {
 
 bool IsValidCodePointIndex(const string16& s, size_t index) {
   return index == 0 || index == s.length() ||
     !(CBU16_IS_TRAIL(s[index]) && CBU16_IS_LEAD(s[index - 1]));
 }
 
 ptrdiff_t UTF16IndexToOffset(const string16& s, size_t base, size_t pos) {
   // The indices point between UTF-16 words (range 0 to s.length() inclusive).
   // In order to consistently handle indices that point to the middle of a
   // surrogate pair, we count the first word in that surrogate pair and not
@@ skipping 24 matching lines @@
   // violation but is handled anyway (by clamping) in release for safety.
   DCHECK_EQ(offset, 0);
   // Since the second half of a surrogate pair has "length" zero, there is an
   // ambiguity in the returned position. Resolve it by always returning a valid
   // index.
   if (!IsValidCodePointIndex(s, pos))
     ++pos;
   return pos;
 }
 
-}  // namespace ui
+}  // namespace gfx