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

Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 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 561 matching lines @@
         return;
 
     m_page->contextMenuController().clearContextMenu();
 
     PlatformMouseEventBuilder pme(mainFrameImpl()->frameView(), event);
 
     // Find the right target frame. See issue 1186900.
     HitTestResult result = hitTestResultForWindowPos(pme.position());
     Frame* targetFrame;
     if (result.innerNonSharedNode())
-        targetFrame = result.innerNonSharedNode()->document()->frame();
+        targetFrame = result.innerNonSharedNode()->document().frame();
     else
         targetFrame = m_page->focusController().focusedOrMainFrame();
 
 #if OS(WINDOWS)
     targetFrame->view()->setCursor(pointerCursor());
 #endif
 
     m_contextMenuAllowed = true;
     targetFrame->eventHandler()->sendContextMenuEvent(pme);
     m_contextMenuAllowed = false;
@@ skipping 486 matching lines @@
     if (!node)
         return WebRect();
 
     // Find the block type node based on the hit node.
     while (node && (!node->renderer() || node->renderer()->isInline()))
         node = node->parentNode();
 
     // Return the bounding box in the window coordinate system.
     if (node) {
         IntRect rect = node->Node::pixelSnappedBoundingBox();
-        Frame* frame = node->document()->frame();
+        Frame* frame = node->document().frame();
         return frame->view()->contentsToWindow(rect);
     }
     return WebRect();
 }
 
 WebRect WebViewImpl::widenRectWithinPageBounds(const WebRect& source, int targetMargin, int minimumMargin)
 {
     WebSize maxSize;
     if (mainFrame())
         maxSize = mainFrame()->contentsSize();
@@ skipping 1181 matching lines @@
     if (!selection)
         return false;
 
     if (selection->isCaret())
         anchor = focus = selection->absoluteCaretBounds();
     else {
         RefPtr<Range> selectedRange = frame->selection()->toNormalizedRange();
         if (!selectedRange)
             return false;
 
-        RefPtr<Range> range(Range::create(selectedRange->startContainer()->document(),
+        RefPtr<Range> range(Range::create(&selectedRange->startContainer()->document(),
             selectedRange->startContainer(),
             selectedRange->startOffset(),
             selectedRange->startContainer(),
             selectedRange->startOffset()));
         anchor = frame->editor().firstRectForRange(range.get());
 
-        range = Range::create(selectedRange->endContainer()->document(),
+        range = Range::create(&selectedRange->endContainer()->document(),
             selectedRange->endContainer(),
             selectedRange->endOffset(),
             selectedRange->endContainer(),
             selectedRange->endOffset());
         focus = frame->editor().firstRectForRange(range.get());
     }
 
     IntRect scaledAnchor(frame->view()->contentsToWindow(anchor));
     IntRect scaledFocus(frame->view()->contentsToWindow(focus));
     scaledAnchor.scale(pageScaleFactor());
@@ skipping 355 matching lines @@
     float scale;
     IntPoint scroll;
     bool needAnimation;
     computeScaleAndScrollForFocusedNode(element, scale, scroll, needAnimation);
     if (needAnimation)
         startPageScaleAnimation(scroll, false, scale, scrollAndScaleAnimationDurationInSeconds);
 }
 
 void WebViewImpl::computeScaleAndScrollForFocusedNode(Node* focusedNode, float& newScale, IntPoint& newScroll, bool& needAnimation)
 {
-    focusedNode->document()->updateLayoutIgnorePendingStylesheets();
+    focusedNode->document().updateLayoutIgnorePendingStylesheets();
 
     // 'caret' is rect encompassing the blinking cursor.
-    IntRect textboxRect = focusedNode->document()->view()->contentsToWindow(pixelSnappedIntRect(focusedNode->Node::boundingBox()));
+    IntRect textboxRect = focusedNode->document().view()->contentsToWindow(pixelSnappedIntRect(focusedNode->Node::boundingBox()));
     WebRect caret, unusedEnd;
     selectionBounds(caret, unusedEnd);
     IntRect unscaledCaret = caret;
     unscaledCaret.scale(1 / pageScaleFactor());
     caret = unscaledCaret;
 
     // Pick a scale which is reasonably readable. This is the scale at which
     // the caret height will become minReadableCaretHeight (adjusted for dpi
     // and font scale factor).
     float targetScale = 1;
@@ skipping 1439 matching lines @@
 }
 
 bool WebViewImpl::shouldDisableDesktopWorkarounds()
 {
     ViewportArguments arguments = mainFrameImpl()->frame()->document()->viewportArguments();
     return arguments.width == ViewportArguments::ValueDeviceWidth || !arguments.userZoom
         || (arguments.minZoom == arguments.maxZoom && arguments.minZoom != ViewportArguments::ValueAuto);
 }
 
 } // namespace WebKit