Convert remaining StringToLowerASCII to ToLowerASCII

net/url_request/url_request_backoff_manager.cc

 // Copyright 2015 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 "net/url_request/url_request_backoff_manager.h"
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
@@ skipping 108 matching lines @@
     }
   }
   return false;
 }
 
 std::string URLRequestBackoffManager::GetIdFromUrl(const GURL& url) const {
   if (!url.is_valid())
     return url.possibly_invalid_spec();
 
   GURL id = url.ReplaceComponents(url_id_replacements_);
-  return base::StringToLowerASCII(id.spec()).c_str();
+  return base::ToLowerASCII(id.spec());
 }
 
 void URLRequestBackoffManager::OnNetworkChange() {
   CalledOnValidThread();
 
   new_entries_since_last_gc_ = 0;
   // Remove all entries.
   for (UrlEntryMap::iterator it = url_entries_.begin();
        it != url_entries_.end(); ++it) {
     delete it->second;
   }
   url_entries_.clear();
 }
 
 }  // namespace net