Remove mojo::String.

mojo/common/common_type_converters.cc

 // Copyright 2013 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 "mojo/common/common_type_converters.h"
 
 #include <stdint.h>
 
 #include <string>
 
-#include "base/strings/utf_string_conversions.h"
-
 namespace mojo {
 
-// static
-String TypeConverter<String, base::StringPiece>::Convert(
-    const base::StringPiece& input) {
-  if (input.empty()) {
-    char c = 0;
-    return String(&c, 0);
-  }
-  return String(input.data(), input.size());
-}
-// static
-base::StringPiece TypeConverter<base::StringPiece, String>::Convert(
-    const String& input) {
-  return input.get();
-}
-
-// static
-String TypeConverter<String, base::string16>::Convert(
-    const base::string16& input) {
-  return TypeConverter<String, base::StringPiece>::Convert(
-      base::UTF16ToUTF8(input));
-}
-// static
-base::string16 TypeConverter<base::string16, String>::Convert(
-    const String& input) {
-  return base::UTF8ToUTF16(input.To<base::StringPiece>());
-}
-
 std::string TypeConverter<std::string, Array<uint8_t>>::Convert(
     const Array<uint8_t>& input) {
   if (input.is_null() || input.empty())
     return std::string();
 
   return std::string(reinterpret_cast<const char*>(&input.front()),
                      input.size());
 }
 
 Array<uint8_t> TypeConverter<Array<uint8_t>, std::string>::Convert(
@@ skipping 23 matching lines @@
 
 Array<uint8_t> TypeConverter<Array<uint8_t>, base::string16>::Convert(
     const base::string16& input) {
   Array<uint8_t> result(input.size() * sizeof(base::char16));
   if (!input.empty())
     memcpy(&result.front(), input.c_str(), input.size() * sizeof(base::char16));
   return result;
 }
 
 }  // namespace mojo