String replaceWithLiteral should just use strlen, also rename to replace.

third_party/WebKit/Source/core/loader/FormSubmission.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 48 matching lines @@
     static int64_t nextIdentifier = static_cast<int64_t>(currentTime() * 1000000.0);
     return ++nextIdentifier;
 }
 
 static void appendMailtoPostFormDataToURL(KURL& url, const EncodedFormData& data, const String& encodingType)
 {
     String body = data.flattenToString();
 
     if (equalIgnoringCase(encodingType, "text/plain")) {
         // Convention seems to be to decode, and s/&/\r\n/. Also, spaces are encoded as %20.
-        body = decodeURLEscapeSequences(body.replaceWithLiteral('&', "\r\n").replace('+', ' ') + "\r\n");
+        body = decodeURLEscapeSequences(body.replace('&', "\r\n").replace('+', ' ') + "\r\n");
     }
 
     Vector<char> bodyData;
     bodyData.append("body=", 5);
     FormDataEncoder::encodeStringAsFormData(bodyData, body.utf8());
-    body = String(bodyData.data(), bodyData.size()).replaceWithLiteral('+', "%20");
+    body = String(bodyData.data(), bodyData.size()).replace('+', "%20");
 
     StringBuilder query;
     query.append(url.query());
     if (!query.isEmpty())
         query.append('&');
     query.append(body);
     url.setQuery(query.toString());
 }
 
 void FormSubmission::Attributes::parseAction(const String& action)
@@ skipping 188 matching lines @@
         if (m_boundary.isEmpty())
             frameRequest.resourceRequest().setHTTPContentType(m_contentType);
         else
             frameRequest.resourceRequest().setHTTPContentType(m_contentType + "; boundary=" + m_boundary);
     }
 
     frameRequest.resourceRequest().setURL(requestURL());
 }
 
 } // namespace blink