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

Source/core/html/shadow/MediaControlElements.cpp

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * 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.
@@ skipping 72 matching lines @@
     if (!m_canBeDragged)
         return;
 
     if (m_isBeingDragged)
         return;
 
     RenderObject* renderer = this->renderer();
     if (!renderer || !renderer->isBox())
         return;
 
-    Frame* frame = document()->frame();
+    Frame* frame = document().frame();
     if (!frame)
         return;
 
     m_lastDragEventLocation = eventLocation;
 
     frame->eventHandler()->setCapturingMouseEventsNode(this);
 
     m_isBeingDragged = true;
 }
 
 void MediaControlPanelElement::continueDrag(const LayoutPoint& eventLocation)
 {
     if (!m_isBeingDragged)
         return;
 
     LayoutSize distanceDragged = eventLocation - m_lastDragEventLocation;
     m_cumulativeDragOffset.move(distanceDragged);
     m_lastDragEventLocation = eventLocation;
     setPosition(m_cumulativeDragOffset);
 }
 
 void MediaControlPanelElement::endDrag()
 {
     if (!m_isBeingDragged)
         return;
 
     m_isBeingDragged = false;
 
-    Frame* frame = document()->frame();
+    Frame* frame = document().frame();
     if (!frame)
         return;
 
     frame->eventHandler()->setCapturingMouseEventsNode(0);
 }
 
 void MediaControlPanelElement::startTimer()
 {
     stopTimer();
 
@@ skipping 440 matching lines @@
 }
 
 void MediaControlFullscreenButtonElement::defaultEventHandler(Event* event)
 {
     if (event->type() == eventNames().clickEvent) {
         // Only use the new full screen API if the fullScreenEnabled setting has
         // been explicitly enabled. Otherwise, use the old fullscreen API. This
         // allows apps which embed a WebView to retain the existing full screen
         // video implementation without requiring them to implement their own full
         // screen behavior.
-        if (document()->settings() && document()->settings()->fullScreenEnabled()) {
+        if (document().settings() && document().settings()->fullScreenEnabled()) {
             if (FullscreenElementStack::isActiveFullScreenElement(toParentMediaElement(this)))
-                FullscreenElementStack::from(document())->webkitCancelFullScreen();
+                FullscreenElementStack::from(&document())->webkitCancelFullScreen();
             else
-                FullscreenElementStack::from(document())->requestFullScreenForElement(toParentMediaElement(this), 0, FullscreenElementStack::ExemptIFrameAllowFullScreenRequirement);
+                FullscreenElementStack::from(&document())->requestFullScreenForElement(toParentMediaElement(this), 0, FullscreenElementStack::ExemptIFrameAllowFullScreenRequirement);
         } else
             mediaController()->enterFullscreen();
         event->setDefaultHandled();
     }
     HTMLInputElement::defaultEventHandler(event);
 }
 
 const AtomicString& MediaControlFullscreenButtonElement::part() const
 {
     DEFINE_STATIC_LOCAL(AtomicString, id, ("-webkit-media-controls-fullscreen-button", AtomicString::ConstructFromLiteral));
@@ skipping 176 matching lines @@
     else
         hide();
 }
 
 void MediaControlTextTrackContainerElement::updateSizes(bool forceUpdate)
 {
     HTMLMediaElement* mediaElement = toParentMediaElement(this);
     if (!mediaElement)
         return;
 
-    if (!document()->page())
+    if (!document().page())
         return;
 
     IntRect videoBox;
 
     if (!mediaElement->renderer() || !mediaElement->renderer()->isVideo())
         return;
     videoBox = toRenderVideo(mediaElement->renderer())->videoBox();
 
     if (!forceUpdate && m_videoDisplaySize == videoBox)
         return;
@@ skipping 10 matching lines @@
     CueList activeCues = mediaElement->currentlyActiveCues();
     for (size_t i = 0; i < activeCues.size(); ++i) {
         TextTrackCue* cue = activeCues[i].data();
         cue->videoSizeDidChange(m_videoDisplaySize.size());
     }
 }
 
 // ----------------------------
 
 } // namespace WebCore