Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/core/html/forms/ColorInputType.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 116 matching lines @@
     ASSERT_UNUSED(success, success);
     return color;
 }
 
 void ColorInputType::createShadowSubtree()
 {
     ASSERT(element().shadow());
 
     Document& document = element().document();
     RefPtrWillBeRawPtr<HTMLDivElement> wrapperElement = HTMLDivElement::create(document);
-    wrapperElement->setShadowPseudoId(AtomicString("-webkit-color-swatch-wrapper", AtomicString::ConstructFromLiteral));
+    wrapperElement->setShadowPseudoId(AtomicString("-webkit-color-swatch-wrapper"));
     RefPtrWillBeRawPtr<HTMLDivElement> colorSwatch = HTMLDivElement::create(document);
-    colorSwatch->setShadowPseudoId(AtomicString("-webkit-color-swatch", AtomicString::ConstructFromLiteral));
+    colorSwatch->setShadowPseudoId(AtomicString("-webkit-color-swatch"));
     wrapperElement->appendChild(colorSwatch.release());
     element().userAgentShadowRoot()->appendChild(wrapperElement.release());
 
     element().updateView();
 }
 
 void ColorInputType::setValue(const String& value, bool valueChanged, TextFieldEventBehavior eventBehavior)
 {
     InputType::setValue(value, valueChanged, eventBehavior);
 
@@ skipping 132 matching lines @@
 {
     return m_chooser ? m_chooser->rootAXObject() : nullptr;
 }
 
 ColorChooserClient* ColorInputType::colorChooserClient()
 {
     return this;
 }
 
 } // namespace blink