String cleanup in sync code

chrome/browser/sync/util/character_set_converters_win.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 "base/utf_string_conversions.h"
 #include "chrome/browser/sync/util/character_set_converters.h"
 
-#include <windows.h>
-
-#include <string>
-
-using std::string;
-
 namespace browser_sync {
 
-// Converts input_string to UTF8 and appends the result into to output_string.
-void AppendPathStringToUTF8(const PathChar* wide, int size,
-                            string* output_string) {
-  CHECK(output_string);
-  if (0 == size)
-    return;
-
-  int needed_space = ::WideCharToMultiByte(CP_UTF8, 0, wide, size, 0, 0, 0, 0);
-  // TODO(sync): This should flag an error when we move to an api that can let
-  // utf-16 -> utf-8 fail.
-  CHECK(0 != needed_space);
-  string::size_type current_size = output_string->size();
-  output_string->resize(current_size + needed_space);
-  CHECK(0 != ::WideCharToMultiByte(CP_UTF8, 0, wide, size,
-      &(*output_string)[current_size], needed_space, 0, 0));
+// Returns UTF8 string from the given FilePath.
+std::string FilePathToUTF8(const FilePath& file_path) {
+  return WideToUTF8(file_path.value());
 }
 
-bool AppendUTF8ToPathString(const char* utf8, size_t size,
-                            PathString* output_string) {
-  CHECK(output_string);
-  if (0 == size)
-    return true;
-  // TODO(sync): Do we want to force precomposed characters here?
-  int needed_wide_chars = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
-      utf8, size, 0, 0);
-  if (0 == needed_wide_chars) {
-    DWORD err = ::GetLastError();
-    if (MB_ERR_INVALID_CHARS == err)
-      return false;
-    CHECK(0 == err);
-  }
-  PathString::size_type current_length = output_string->size();
-  output_string->resize(current_length + needed_wide_chars);
-  CHECK(0 != ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, utf8, size,
-      &(*output_string)[current_length], needed_wide_chars));
-  return true;
-}
-
-void TrimPathStringToValidCharacter(PathString* string) {
-  CHECK(string);
-  // Constants from http://en.wikipedia.org/wiki/UTF-16
-  if (string->empty())
-    return;
-  if (0x0dc00 == (string->at(string->length() - 1) & 0x0fc00))
-    string->resize(string->length() - 1);
+// Returns FilePath from the given UTF8 string.
+FilePath UTF8ToFilePath(const std::string& utf8) {
+  return FilePath(UTF8ToWide(utf8));
 }
 
 }  // namespace browser_sync