Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/core/html/forms/TextFieldInputType.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 82 matching lines @@
 
     bool willRespondToMouseClickEvents() override
     {
         return hostInput() && !hostInput()->isDisabledOrReadOnly() && document().isActive();
     }
 
 public:
     static PassRefPtrWillBeRawPtr<DataListIndicatorElement> create(Document& document)
     {
         RefPtrWillBeRawPtr<DataListIndicatorElement> element = adoptRefWillBeNoop(new DataListIndicatorElement(document));
-        element->setShadowPseudoId(AtomicString("-webkit-calendar-picker-indicator", AtomicString::ConstructFromLiteral));
+        element->setShadowPseudoId(AtomicString("-webkit-calendar-picker-indicator"));
         element->setAttribute(idAttr, ShadowElementNames::pickerIndicator());
         return element.release();
     }
 
 };
 
 TextFieldInputType::TextFieldInputType(HTMLInputElement& element)
     : InputType(element)
 {
 }
@@ skipping 173 matching lines @@
     bool shouldHaveDataListIndicator = element().hasValidDataListOptions();
     bool createsContainer = shouldHaveSpinButton || shouldHaveDataListIndicator || needsContainer();
 
     RefPtrWillBeRawPtr<TextControlInnerEditorElement> innerEditor = TextControlInnerEditorElement::create(document);
     if (!createsContainer) {
         shadowRoot->appendChild(innerEditor.release());
         return;
     }
 
     RefPtrWillBeRawPtr<TextControlInnerContainer> container = TextControlInnerContainer::create(document);
-    container->setShadowPseudoId(AtomicString("-webkit-textfield-decoration-container", AtomicString::ConstructFromLiteral));
+    container->setShadowPseudoId(AtomicString("-webkit-textfield-decoration-container"));
     shadowRoot->appendChild(container);
 
     RefPtrWillBeRawPtr<EditingViewPortElement> editingViewPort = EditingViewPortElement::create(document);
     editingViewPort->appendChild(innerEditor.release());
     container->appendChild(editingViewPort.release());
 
     if (shouldHaveDataListIndicator)
         container->appendChild(DataListIndicatorElement::create(document));
     // FIXME: Because of a special handling for a spin button in
     // LayoutTextControlSingleLine, we need to put it to the last position. It's
@@ skipping 28 matching lines @@
     EventDispatchForbiddenScope::AllowUserAgentEvents allowEvents;
     if (willHavePickerIndicator) {
         Document& document = element().document();
         if (Element* container = containerElement()) {
             container->insertBefore(DataListIndicatorElement::create(document), spinButtonElement());
         } else {
             // FIXME: The following code is similar to createShadowSubtree(),
             // but they are different. We should simplify the code by making
             // containerElement mandatory.
             RefPtrWillBeRawPtr<Element> rpContainer = TextControlInnerContainer::create(document);
-            rpContainer->setShadowPseudoId(AtomicString("-webkit-textfield-decoration-container", AtomicString::ConstructFromLiteral));
+            rpContainer->setShadowPseudoId(AtomicString("-webkit-textfield-decoration-container"));
             RefPtrWillBeRawPtr<Element> innerEditor = element().innerEditorElement();
             innerEditor->parentNode()->replaceChild(rpContainer.get(), innerEditor.get());
             RefPtrWillBeRawPtr<Element> editingViewPort = EditingViewPortElement::create(document);
             editingViewPort->appendChild(innerEditor.release());
             rpContainer->appendChild(editingViewPort.release());
             rpContainer->appendChild(DataListIndicatorElement::create(document));
             if (element().document().focusedElement() == element())
                 element().updateFocusAppearance(SelectionBehaviorOnFocus::Restore);
         }
     } else {
@@ skipping 95 matching lines @@
     HTMLElement* placeholder = element().placeholderElement();
     String placeholderText = element().strippedPlaceholder();
     if (placeholderText.isEmpty()) {
         if (placeholder)
             placeholder->remove(ASSERT_NO_EXCEPTION);
         return;
     }
     if (!placeholder) {
         RefPtrWillBeRawPtr<HTMLElement> newElement = HTMLDivElement::create(element().document());
         placeholder = newElement.get();
-        placeholder->setShadowPseudoId(AtomicString("-webkit-input-placeholder", AtomicString::ConstructFromLiteral));
+        placeholder->setShadowPseudoId(AtomicString("-webkit-input-placeholder"));
         placeholder->setInlineStyleProperty(CSSPropertyDisplay, element().isPlaceholderVisible() ? CSSValueBlock : CSSValueNone, true);
         placeholder->setAttribute(idAttr, ShadowElementNames::placeholder());
         Element* container = containerElement();
         Node* previous = container ? container : element().innerEditorElement();
         previous->parentNode()->insertBefore(placeholder, previous);
         ASSERT_WITH_SECURITY_IMPLICATION(placeholder->parentNode() == previous->parentNode());
     }
     placeholder->setTextContent(placeholderText);
 }
 
@@ skipping 75 matching lines @@
     return shouldSpinButtonRespondToMouseEvents() && element().focused();
 }
 
 void TextFieldInputType::spinButtonDidReleaseMouseCapture(SpinButtonElement::EventDispatch eventDispatch)
 {
     if (eventDispatch == SpinButtonElement::EventDispatchAllowed)
         element().dispatchFormControlChangeEvent();
 }
 
 } // namespace blink