Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/core/svg/SVGAnimateMotionElement.cpp

 /*
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 82 matching lines @@
         buildPathFromString(value, m_path);
         updateAnimationPath();
         return;
     }
 
     SVGAnimationElement::parseAttribute(name, oldValue, value);
 }
 
 SVGAnimateMotionElement::RotateMode SVGAnimateMotionElement::getRotateMode() const
 {
-    DEFINE_STATIC_LOCAL(const AtomicString, autoVal, ("auto", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, autoReverse, ("auto-reverse", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(const AtomicString, autoVal, ("auto"));
+    DEFINE_STATIC_LOCAL(const AtomicString, autoReverse, ("auto-reverse"));
     const AtomicString& rotate = getAttribute(SVGNames::rotateAttr);
     if (rotate == autoVal)
         return RotateAuto;
     if (rotate == autoReverse)
         return RotateAutoReverse;
     return RotateAngle;
 }
 
 void SVGAnimateMotionElement::updateAnimationPath()
 {
@@ skipping 197 matching lines @@
 
 void SVGAnimateMotionElement::updateAnimationMode()
 {
     if (!m_animationPath.isEmpty())
         setAnimationMode(PathAnimation);
     else
         SVGAnimationElement::updateAnimationMode();
 }
 
 } // namespace blink