Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/core/html/shadow/DateTimeEditElement.cpp

 /*
  * Copyright (C) 2012 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 382 matching lines @@
 bool DateTimeEditBuilder::shouldYearFieldDisabled() const
 {
     return m_parameters.minimum.getType() != DateComponents::Invalid
         && m_parameters.maximum.getType() != DateComponents::Invalid
         && m_parameters.minimum.fullYear() == m_parameters.maximum.fullYear()
         && m_parameters.minimum.fullYear() == m_dateValue.fullYear();
 }
 
 void DateTimeEditBuilder::visitLiteral(const String& text)
 {
-    DEFINE_STATIC_LOCAL(AtomicString, textPseudoId, ("-webkit-datetime-edit-text", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(AtomicString, textPseudoId, ("-webkit-datetime-edit-text"));
     ASSERT(text.length());
     RefPtrWillBeRawPtr<HTMLDivElement> element = HTMLDivElement::create(editElement().document());
     element->setShadowPseudoId(textPseudoId);
     if (m_parameters.locale.isRTL() && text.length()) {
         CharDirection dir = direction(text[0]);
         if (dir == SegmentSeparator || dir == WhiteSpaceNeutral || dir == OtherNeutral)
             element->appendChild(Text::create(editElement().document(), String(&rightToLeftMarkCharacter, 1)));
     }
     element->appendChild(Text::create(editElement().document(), text));
     editElement().fieldsWrapperElement()->appendChild(element);
@@ skipping 80 matching lines @@
 
 void DateTimeEditElement::blurByOwner()
 {
     if (DateTimeFieldElement* field = focusedField())
         field->blur();
 }
 
 PassRefPtrWillBeRawPtr<DateTimeEditElement> DateTimeEditElement::create(Document& document, EditControlOwner& editControlOwner)
 {
     RefPtrWillBeRawPtr<DateTimeEditElement> container = adoptRefWillBeNoop(new DateTimeEditElement(document, editControlOwner));
-    container->setShadowPseudoId(AtomicString("-webkit-datetime-edit", AtomicString::ConstructFromLiteral));
+    container->setShadowPseudoId(AtomicString("-webkit-datetime-edit"));
     container->setAttribute(idAttr, ShadowElementNames::dateTimeEdit());
     return container.release();
 }
 
 PassRefPtr<ComputedStyle> DateTimeEditElement::customStyleForLayoutObject()
 {
     // FIXME: This is a kind of layout. We might want to introduce new layoutObject.
     RefPtr<ComputedStyle> originalStyle = originalStyleForLayoutObject();
     RefPtr<ComputedStyle> style = ComputedStyle::clone(*originalStyle);
     float width = 0;
@@ skipping 146 matching lines @@
     return isReadOnly();
 }
 
 bool DateTimeEditElement::isReadOnly() const
 {
     return m_editControlOwner && m_editControlOwner->isEditControlOwnerReadOnly();
 }
 
 void DateTimeEditElement::layout(const LayoutParameters& layoutParameters, const DateComponents& dateValue)
 {
-    DEFINE_STATIC_LOCAL(AtomicString, fieldsWrapperPseudoId, ("-webkit-datetime-edit-fields-wrapper", AtomicString::ConstructFromLiteral));
+    DEFINE_STATIC_LOCAL(AtomicString, fieldsWrapperPseudoId, ("-webkit-datetime-edit-fields-wrapper"));
     if (!hasChildren()) {
         RefPtrWillBeRawPtr<HTMLDivElement> element = HTMLDivElement::create(document());
         element->setShadowPseudoId(fieldsWrapperPseudoId);
         appendChild(element.get());
     }
     Element* fieldsWrapper = fieldsWrapperElement();
 
     size_t focusedFieldIndex = this->focusedFieldIndex();
     DateTimeFieldElement* const focusedField = fieldAt(focusedFieldIndex);
     const AtomicString focusedFieldId = focusedField ? focusedField->shadowPseudoId() : nullAtom;
@@ skipping 133 matching lines @@
 {
     DateTimeFieldsState dateTimeFieldsState;
     for (size_t fieldIndex = 0; fieldIndex < m_fields.size(); ++fieldIndex)
         m_fields[fieldIndex]->populateDateTimeFieldsState(dateTimeFieldsState);
     return dateTimeFieldsState;
 }
 
 } // namespace blink
 
 #endif