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

Source/core/html/shadow/PasswordGeneratorButtonElement.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:
  *
  *     * 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 71 matching lines @@
 }
 
 void PasswordGeneratorButtonElement::decorate(HTMLInputElement* input)
 {
     ASSERT(input);
     ShadowRoot* existingRoot;
     ShadowRoot* decorationRoot;
     getDecorationRootAndDecoratedRoot(input, decorationRoot, existingRoot);
     ASSERT(decorationRoot);
     ASSERT(existingRoot);
-    RefPtr<HTMLDivElement> box = HTMLDivElement::create(input->document());
+    RefPtr<HTMLDivElement> box = HTMLDivElement::create(&input->document());
     decorationRoot->appendChild(box);
     box->setInlineStyleProperty(CSSPropertyDisplay, CSSValueFlex);
     box->setInlineStyleProperty(CSSPropertyAlignItems, CSSValueCenter);
     ASSERT(existingRoot->childNodeCount() == 1);
     toHTMLElement(existingRoot->firstChild())->setInlineStyleProperty(CSSPropertyFlexGrow, 1.0, CSSPrimitiveValue::CSS_NUMBER);
-    box->appendChild(HTMLShadowElement::create(HTMLNames::shadowTag, input->document()));
+    box->appendChild(HTMLShadowElement::create(HTMLNames::shadowTag, &input->document()));
     setInlineStyleProperty(CSSPropertyDisplay, CSSValueNone);
     box->appendChild(this);
 }
 
 inline HTMLInputElement* PasswordGeneratorButtonElement::hostInput()
 {
     // PasswordGeneratorButtonElement is created only by C++ code, and it is always
     // in <input> shadow.
     return toHTMLInputElement(shadowHost());
 }
@@ skipping 55 matching lines @@
 {
     RefPtr<HTMLInputElement> input = hostInput();
     if (!input || input->isDisabledOrReadOnly() || !event->isMouseEvent()) {
         if (!event->defaultHandled())
             HTMLDivElement::defaultEventHandler(event);
         return;
     }
 
     RefPtr<PasswordGeneratorButtonElement> protector(this);
     if (event->type() == eventNames().clickEvent) {
-        if (Page* page = document()->page())
+        if (Page* page = document().page())
             page->chrome().client().openPasswordGenerator(input.get());
         event->setDefaultHandled();
     }
 
     if (event->type() == eventNames().mouseoverEvent) {
         m_isInHoverState = true;
         updateImage();
     }
 
     if (event->type() == eventNames().mouseoutEvent) {
@@ skipping 17 matching lines @@
 bool PasswordGeneratorButtonElement::willRespondToMouseClickEvents()
 {
     const HTMLInputElement* input = hostInput();
     if (!input->isDisabledOrReadOnly())
         return true;
 
     return HTMLDivElement::willRespondToMouseClickEvents();
 }
 
 } // namespace WebCore