Final part of PathString cleanup.

chrome/browser/sync/util/character_set_converters.cc

-// Copyright (c) 2009 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 "chrome/browser/sync/util/character_set_converters.h"
-
-namespace browser_sync {
-
-void TrimPathStringToValidCharacter(std::string* string) {
-  // Constants from http://en.wikipedia.org/wiki/UTF-8
-  CHECK(string);
-  if (string->empty())
-    return;
-  if (0 == (string->at(string->length() - 1) & 0x080))
-    return;
-  size_t partial_enc_bytes = 0;
-  for (partial_enc_bytes = 0 ; true ; ++partial_enc_bytes) {
-    if (4 == partial_enc_bytes || partial_enc_bytes == string->length()) {
-      // original string was broken, garbage in, garbage out.
-      return;
-    }
-    PathChar c = string->at(string->length() - 1 - partial_enc_bytes);
-    if ((c & 0x0c0) == 0x080)  // utf continuation char;
-      continue;
-    if ((c & 0x0e0) == 0x0e0) {  // 2-byte encoded char.
-      if (1 == partial_enc_bytes)
-        return;
-      else
-        break;
-    }
-    if ((c & 0x0f0) == 0xc0) {  // 3-byte encoded char.
-      if (2 == partial_enc_bytes)
-        return;
-      else
-        break;
-    }
-    if ((c & 0x0f8) == 0x0f0) {  // 4-byte encoded char.
-      if (3 == partial_enc_bytes)
-        return;
-      else
-        break;
-    }
-  }
-  string->resize(string->length() - 1 - partial_enc_bytes);
-}
-
-}  // namespace browser_sync