Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/core/html/forms/RangeInputType.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 224 matching lines @@
 
     event->setDefaultHandled();
 }
 
 void RangeInputType::createShadowSubtree()
 {
     ASSERT(element().shadow());
 
     Document& document = element().document();
     RefPtrWillBeRawPtr<HTMLDivElement> track = HTMLDivElement::create(document);
-    track->setShadowPseudoId(AtomicString("-webkit-slider-runnable-track", AtomicString::ConstructFromLiteral));
+    track->setShadowPseudoId(AtomicString("-webkit-slider-runnable-track"));
     track->setAttribute(idAttr, ShadowElementNames::sliderTrack());
     track->appendChild(SliderThumbElement::create(document));
     RefPtrWillBeRawPtr<HTMLElement> container = SliderContainerElement::create(document);
     container->appendChild(track.release());
     element().userAgentShadowRoot()->appendChild(container.release());
 }
 
 LayoutObject* RangeInputType::createLayoutObject(const ComputedStyle&) const
 {
     return new LayoutSlider(&element());
@@ skipping 141 matching lines @@
             right = middle;
     }
     const Decimal closestLeft = middle ? m_tickMarkValues[middle - 1] : Decimal::infinity(Decimal::Negative);
     const Decimal closestRight = middle != m_tickMarkValues.size() ? m_tickMarkValues[middle] : Decimal::infinity(Decimal::Positive);
     if (closestRight - value < value - closestLeft)
         return closestRight;
     return closestLeft;
 }
 
 } // namespace blink