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

Source/core/svg/SVGTextContentElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Rob Buis <buis@kde.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 85 matching lines @@
     if (m_specifiedTextLength == defaultTextLength)
         m_textLength.value.newValueSpecifiedUnits(LengthTypeNumber, getComputedTextLength(), ASSERT_NO_EXCEPTION);
 
     m_textLength.shouldSynchronize = true;
     return static_pointer_cast<SVGAnimatedLength>(lookupOrCreateTextLengthWrapper(this));
 
 }
 
 unsigned SVGTextContentElement::getNumberOfChars()
 {
-    document()->updateLayoutIgnorePendingStylesheets();
+    document().updateLayoutIgnorePendingStylesheets();
     return SVGTextQuery(renderer()).numberOfCharacters();
 }
 
 float SVGTextContentElement::getComputedTextLength()
 {
-    document()->updateLayoutIgnorePendingStylesheets();
+    document().updateLayoutIgnorePendingStylesheets();
     return SVGTextQuery(renderer()).textLength();
 }
 
 float SVGTextContentElement::getSubStringLength(unsigned charnum, unsigned nchars, ExceptionState& es)
 {
-    document()->updateLayoutIgnorePendingStylesheets();
+    document().updateLayoutIgnorePendingStylesheets();
 
     unsigned numberOfChars = getNumberOfChars();
     if (charnum >= numberOfChars) {
         es.throwDOMException(IndexSizeError);
         return 0.0f;
     }
 
     if (nchars > numberOfChars - charnum)
         nchars = numberOfChars - charnum;
 
     return SVGTextQuery(renderer()).subStringLength(charnum, nchars);
 }
 
 SVGPoint SVGTextContentElement::getStartPositionOfChar(unsigned charnum, ExceptionState& es)
 {
-    document()->updateLayoutIgnorePendingStylesheets();
+    document().updateLayoutIgnorePendingStylesheets();
 
     if (charnum > getNumberOfChars()) {
         es.throwDOMException(IndexSizeError);
         return FloatPoint();
     }
 
     return SVGTextQuery(renderer()).startPositionOfCharacter(charnum);
 }
 
 SVGPoint SVGTextContentElement::getEndPositionOfChar(unsigned charnum, ExceptionState& es)
 {
-    document()->updateLayoutIgnorePendingStylesheets();
+    document().updateLayoutIgnorePendingStylesheets();
 
     if (charnum > getNumberOfChars()) {
         es.throwDOMException(IndexSizeError);
         return FloatPoint();
     }
 
     return SVGTextQuery(renderer()).endPositionOfCharacter(charnum);
 }
 
 SVGRect SVGTextContentElement::getExtentOfChar(unsigned charnum, ExceptionState& es)
 {
-    document()->updateLayoutIgnorePendingStylesheets();
+    document().updateLayoutIgnorePendingStylesheets();
 
     if (charnum > getNumberOfChars()) {
         es.throwDOMException(IndexSizeError);
         return SVGRect();
     }
 
     return SVGTextQuery(renderer()).extentOfCharacter(charnum);
 }
 
 float SVGTextContentElement::getRotationOfChar(unsigned charnum, ExceptionState& es)
 {
-    document()->updateLayoutIgnorePendingStylesheets();
+    document().updateLayoutIgnorePendingStylesheets();
 
     if (charnum > getNumberOfChars()) {
         es.throwDOMException(IndexSizeError);
         return 0.0f;
     }
 
     return SVGTextQuery(renderer()).rotationOfCharacter(charnum);
 }
 
 int SVGTextContentElement::getCharNumAtPosition(const SVGPoint& point)
 {
-    document()->updateLayoutIgnorePendingStylesheets();
+    document().updateLayoutIgnorePendingStylesheets();
     return SVGTextQuery(renderer()).characterNumberAtPosition(point);
 }
 
 void SVGTextContentElement::selectSubString(unsigned charnum, unsigned nchars, ExceptionState& es)
 {
     unsigned numberOfChars = getNumberOfChars();
     if (charnum >= numberOfChars) {
         es.throwDOMException(IndexSizeError);
         return;
     }
 
     if (nchars > numberOfChars - charnum)
         nchars = numberOfChars - charnum;
 
-    ASSERT(document());
-    ASSERT(document()->frame());
+    ASSERT(document().frame());
 
-    FrameSelection* selection = document()->frame()->selection();
+    FrameSelection* selection = document().frame()->selection();
     if (!selection)
         return;
 
     // Find selection start
     VisiblePosition start(firstPositionInNode(const_cast<SVGTextContentElement*>(this)));
     for (unsigned i = 0; i < charnum; ++i)
         start = start.next();
 
     // Find selection end
     VisiblePosition end(start);
@@ skipping 91 matching lines @@
     SVGElement* element = toSVGElement(renderer->node());
     ASSERT(element);
 
     if (!element->isTextContent())
         return 0;
 
     return toSVGTextContentElement(element);
 }
 
 }