Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/core/html/HTMLTextFormControlElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * 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
@@ skipping 438 matching lines @@
     ASSERT(isTextFormControl());
     LocalFrame* frame = document().frame();
     if (!frame)
         return 0;
 
     return indexForPosition(innerEditorElement(), frame->selection().end());
 }
 
 static const AtomicString& directionString(TextFieldSelectionDirection direction)
 {
-    DEFINE_STATIC_LOCAL(const AtomicString, none, ("none", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, forward, ("forward", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, backward, ("backward", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(const AtomicString, none, ("none"));
+    DEFINE_STATIC_LOCAL(const AtomicString, forward, ("forward"));
+    DEFINE_STATIC_LOCAL(const AtomicString, backward, ("backward"));
 
     switch (direction) {
     case SelectionHasNoDirection:
         return none;
     case SelectionHasForwardDirection:
         return forward;
     case SelectionHasBackwardDirection:
         return backward;
     }
 
@@ skipping 69 matching lines @@
     }
 
     if (!startNode || !endNode)
         return nullptr;
 
     return Range::create(document(), startNode, start, endNode, end);
 }
 
 const AtomicString& HTMLTextFormControlElement::autocapitalize() const
 {
-    DEFINE_STATIC_LOCAL(const AtomicString, off, ("off", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, none, ("none", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, characters, ("characters", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, words, ("words", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, sentences, ("sentences", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(const AtomicString, off, ("off"));
+    DEFINE_STATIC_LOCAL(const AtomicString, none, ("none"));
+    DEFINE_STATIC_LOCAL(const AtomicString, characters, ("characters"));
+    DEFINE_STATIC_LOCAL(const AtomicString, words, ("words"));
+    DEFINE_STATIC_LOCAL(const AtomicString, sentences, ("sentences"));
 
     const AtomicString& value = fastGetAttribute(autocapitalizeAttr);
     if (equalIgnoringCase(value, none) || equalIgnoringCase(value, off))
         return none;
     if (equalIgnoringCase(value, characters))
         return characters;
     if (equalIgnoringCase(value, words))
         return words;
     if (equalIgnoringCase(value, sentences))
         return sentences;
@@ skipping 462 matching lines @@
 }
 
 void HTMLTextFormControlElement::copyNonAttributePropertiesFromElement(const Element& source)
 {
     const HTMLTextFormControlElement& sourceElement = static_cast<const HTMLTextFormControlElement&>(source);
     m_lastChangeWasUserEdit = sourceElement.m_lastChangeWasUserEdit;
     HTMLFormControlElement::copyNonAttributePropertiesFromElement(source);
 }
 
 } // namespace blink