Revert of Remove StringBuilder::appendLiteral.

third_party/WebKit/Source/core/frame/FrameConsole.cpp

 /*
  * Copyright (C) 2013 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 147 matching lines @@
 }
 
 void FrameConsole::didFailLoading(unsigned long requestIdentifier, const ResourceError& error)
 {
     if (error.isCancellation()) // Report failures only.
         return;
     ConsoleMessageStorage* storage = messageStorage();
     if (!storage)
         return;
     StringBuilder message;
-    message.append("Failed to load resource");
+    message.appendLiteral("Failed to load resource");
     if (!error.localizedDescription().isEmpty()) {
-        message.append(": ");
+        message.appendLiteral(": ");
         message.append(error.localizedDescription());
     }
     ConsoleMessage* consoleMessage = ConsoleMessage::createForRequest(NetworkMessageSource, ErrorMessageLevel, message.toString(), error.failingURL(), requestIdentifier);
     storage->reportMessage(m_frame->document(), consoleMessage);
 }
 
 DEFINE_TRACE(FrameConsole)
 {
     visitor->trace(m_frame);
 }
 
 } // namespace blink