Replace ToLower calls to the new format

chrome/common/custom_handlers/protocol_handler.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 "chrome/common/custom_handlers/protocol_handler.h"
 
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "net/base/escape.h"
 
 
 ProtocolHandler::ProtocolHandler(const std::string& protocol,
                                  const GURL& url)
     : protocol_(protocol),
       url_(url) {
 }
 
 ProtocolHandler ProtocolHandler::CreateProtocolHandler(
     const std::string& protocol,
     const GURL& url) {
-  std::string lower_protocol = base::StringToLowerASCII(protocol);
+  std::string lower_protocol = base::ToLowerASCII(protocol);
   return ProtocolHandler(lower_protocol, url);
 }
 
 ProtocolHandler::ProtocolHandler() {
 }
 
 bool ProtocolHandler::IsValidDict(const base::DictionaryValue* value) {
   // Note that "title" parameter is ignored.
   return value->HasKey("protocol") && value->HasKey("url");
 }
@@ skipping 45 matching lines @@
   return protocol_ == other.protocol_ && url_ == other.url_;
 }
 
 bool ProtocolHandler::IsEquivalent(const ProtocolHandler& other) const {
   return protocol_ == other.protocol_ && url_ == other.url_;
 }
 
 bool ProtocolHandler::operator<(const ProtocolHandler& other) const {
   return url_ < other.url_;
 }