Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/core/html/shadow/ClearButtonElement.cpp

 /*
  * Copyright (C) 2013 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:
  * 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
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 26 matching lines @@
 
 inline ClearButtonElement::ClearButtonElement(Document& document, ClearButtonOwner& clearButtonOwner)
     : HTMLDivElement(document)
     , m_clearButtonOwner(&clearButtonOwner)
 {
 }
 
 PassRefPtrWillBeRawPtr<ClearButtonElement> ClearButtonElement::create(Document& document, ClearButtonOwner& clearButtonOwner)
 {
     RefPtrWillBeRawPtr<ClearButtonElement> element = adoptRefWillBeNoop(new ClearButtonElement(document, clearButtonOwner));
-    element->setShadowPseudoId(AtomicString("-webkit-clear-button", AtomicString::ConstructFromLiteral));
+    element->setShadowPseudoId(AtomicString("-webkit-clear-button"));
     element->setAttribute(idAttr, ShadowElementNames::clearButton());
     return element.release();
 }
 
 void ClearButtonElement::detach(const AttachContext& context)
 {
     HTMLDivElement::detach(context);
 }
 
 void ClearButtonElement::defaultEventHandler(Event* event)
@@ skipping 27 matching lines @@
     return true;
 }
 
 DEFINE_TRACE(ClearButtonElement)
 {
     visitor->trace(m_clearButtonOwner);
     HTMLDivElement::trace(visitor);
 }
 
 } // namespace blink