Literal AtomicString construction can rely on strlen optimization.

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

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * 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, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
@@ skipping 98 matching lines @@
     select->ensureUserAgentShadowRoot();
     return select.release();
 }
 
 HTMLSelectElement::~HTMLSelectElement()
 {
 }
 
 const AtomicString& HTMLSelectElement::formControlType() const
 {
-    DEFINE_STATIC_LOCAL(const AtomicString, selectMultiple, ("select-multiple", AtomicString::ConstructFromLiteral));
-    DEFINE_STATIC_LOCAL(const AtomicString, selectOne, ("select-one", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(const AtomicString, selectMultiple, ("select-multiple"));
+    DEFINE_STATIC_LOCAL(const AtomicString, selectOne, ("select-one"));
     return m_multiple ? selectMultiple : selectOne;
 }
 
 void HTMLSelectElement::optionSelectedByUser(int optionIndex, bool fireOnChangeNow, bool allowMultipleSelection)
 {
     // User interaction such as mousedown events can cause list box select
     // elements to send change events.  This produces that same behavior for
     // changes triggered by other code running on behalf of the user.
     if (!usesMenuList()) {
         updateSelectedState(item(optionIndex), allowMultipleSelection, false);
@@ skipping 1856 matching lines @@
     m_popupIsVisible = false;
     m_popup = nullptr;
 }
 
 void HTMLSelectElement::resetTypeAheadSessionForTesting()
 {
     m_typeAhead.resetSession();
 }
 
 } // namespace blink