Have Node::document() return a reference instead of a pointer

Source/core/html/BaseMultipleFieldsDateAndTimeInputType.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 132 matching lines @@
     return toClearButtonElement(element()->userAgentShadowRoot()->getElementById(ShadowElementNames::clearButton()));
 }
 
 PickerIndicatorElement* BaseMultipleFieldsDateAndTimeInputType::pickerIndicatorElement() const
 {
     return toPickerIndicatorElement(element()->userAgentShadowRoot()->getElementById(ShadowElementNames::pickerIndicator()));
 }
 
 inline bool BaseMultipleFieldsDateAndTimeInputType::containsFocusedShadowElement() const
 {
-    return element()->userAgentShadowRoot()->contains(element()->document()->focusedElement());
+    return element()->userAgentShadowRoot()->contains(element()->document().focusedElement());
 }
 
 void BaseMultipleFieldsDateAndTimeInputType::didBlurFromControl()
 {
     // We don't need to call blur(). This function is called when control
     // lost focus.
 
     if (containsFocusedShadowElement())
         return;
     RefPtr<HTMLInputElement> protector(element());
@@ skipping 159 matching lines @@
 void BaseMultipleFieldsDateAndTimeInputType::createShadowSubtree()
 {
     ASSERT(element()->shadow());
 
     // Element must not have a renderer here, because if it did
     // DateTimeEditElement::customStyleForRenderer() is called in appendChild()
     // before the field wrapper element is created.
     // FIXME: This code should not depend on such craziness.
     ASSERT(!element()->renderer());
 
-    Document* document = element()->document();
+    Document& document = element()->document();
     ContainerNode* container = element()->userAgentShadowRoot();
 
-    container->appendChild(DateTimeEditElement::create(document, *this));
+    container->appendChild(DateTimeEditElement::create(&document, *this));
     updateInnerTextValue();
-    container->appendChild(ClearButtonElement::create(document, *this));
-    container->appendChild(SpinButtonElement::create(document, *this));
+    container->appendChild(ClearButtonElement::create(&document, *this));
+    container->appendChild(SpinButtonElement::create(&document, *this));
 
     bool shouldAddPickerIndicator = false;
     if (InputType::themeSupportsDataListUI(this))
         shouldAddPickerIndicator = true;
     if (RenderTheme::theme().supportsCalendarPicker(formControlType())) {
         shouldAddPickerIndicator = true;
         m_pickerIndicatorIsAlwaysVisible = true;
     }
     if (shouldAddPickerIndicator) {
-        container->appendChild(PickerIndicatorElement::create(document, *this));
+        container->appendChild(PickerIndicatorElement::create(&document, *this));
         m_pickerIndicatorIsVisible = true;
         updatePickerIndicatorVisibility();
     }
     m_didCreateShadowElements = true;
 }
 
 void BaseMultipleFieldsDateAndTimeInputType::destroyShadowSubtree()
 {
     ASSERT(!m_isDestroyingShadowSubtree);
     m_isDestroyingShadowSubtree = true;
@@ skipping 14 matching lines @@
     BaseDateAndTimeInputType::destroyShadowSubtree();
     m_isDestroyingShadowSubtree = false;
 }
 
 void BaseMultipleFieldsDateAndTimeInputType::handleFocusEvent(Element* oldFocusedElement, FocusDirection direction)
 {
     DateTimeEditElement* edit = dateTimeEditElement();
     if (!edit || m_isDestroyingShadowSubtree)
         return;
     if (direction == FocusDirectionBackward) {
-        if (element()->document()->page())
-            element()->document()->page()->focusController().advanceFocus(direction);
+        if (element()->document().page())
+            element()->document().page()->focusController().advanceFocus(direction);
     } else if (direction == FocusDirectionNone || direction == FocusDirectionMouse || direction == FocusDirectionPage) {
         edit->focusByOwner(oldFocusedElement);
     } else
         edit->focusByOwner();
 }
 
 void BaseMultipleFieldsDateAndTimeInputType::forwardEvent(Event* event)
 {
     if (SpinButtonElement* element = spinButtonElement()) {
         element->forwardEvent(event);
@@ skipping 14 matching lines @@
 }
 
 void BaseMultipleFieldsDateAndTimeInputType::requiredAttributeChanged()
 {
     clearButtonElement()->releaseCapture();
     updateClearButtonVisibility();
 }
 
 void BaseMultipleFieldsDateAndTimeInputType::handleKeydownEvent(KeyboardEvent* event)
 {
-    Document* document = element()->document();
     if (m_pickerIndicatorIsVisible
         && ((event->keyIdentifier() == "Down" && event->getModifierState("Alt")) || (RenderTheme::theme().shouldOpenPickerWithF4Key() && event->keyIdentifier() == "F4"))) {
         if (PickerIndicatorElement* element = pickerIndicatorElement())
             element->openPopup();
         event->setDefaultHandled();
     } else
         forwardEvent(event);
 }
 
 bool BaseMultipleFieldsDateAndTimeInputType::hasBadInput() const
@@ skipping 169 matching lines @@
 
     if (element()->isRequired() || !dateTimeEditElement()->anyEditableFieldsHaveValues())
         clearButton->setInlineStyleProperty(CSSPropertyVisibility, CSSValueHidden);
     else
         clearButton->removeInlineStyleProperty(CSSPropertyVisibility);
 }
 
 } // namespace WebCore
 
 #endif