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

Source/core/html/HTMLTableElement.cpp

Index: Source/core/html/HTMLTableElement.cpp
diff --git a/Source/core/html/HTMLTableElement.cpp b/Source/core/html/HTMLTableElement.cpp
index 6950114fa3b382574cb7904f338e4cc02d68570f..3be27279f13f7a1343f21269b437a01a129fff2f 100644
--- a/Source/core/html/HTMLTableElement.cpp
+++ b/Source/core/html/HTMLTableElement.cpp
@@ -129,7 +129,7 @@ PassRefPtr<HTMLElement> HTMLTableElement::createTHead()
 {
     if (HTMLTableSectionElement* existingHead = tHead())
         return existingHead;
-    RefPtr<HTMLTableSectionElement> head = HTMLTableSectionElement::create(theadTag, document());
+    RefPtr<HTMLTableSectionElement> head = HTMLTableSectionElement::create(theadTag, &document());
     setTHead(head, IGNORE_EXCEPTION);
     return head.release();
 }
@@ -143,7 +143,7 @@ PassRefPtr<HTMLElement> HTMLTableElement::createTFoot()
 {
     if (HTMLTableSectionElement* existingFoot = tFoot())
         return existingFoot;
-    RefPtr<HTMLTableSectionElement> foot = HTMLTableSectionElement::create(tfootTag, document());
+    RefPtr<HTMLTableSectionElement> foot = HTMLTableSectionElement::create(tfootTag, &document());
     setTFoot(foot, IGNORE_EXCEPTION);
     return foot.release();
 }
@@ -155,7 +155,7 @@ void HTMLTableElement::deleteTFoot()
 
 PassRefPtr<HTMLElement> HTMLTableElement::createTBody()
 {
-    RefPtr<HTMLTableSectionElement> body = HTMLTableSectionElement::create(tbodyTag, document());
+    RefPtr<HTMLTableSectionElement> body = HTMLTableSectionElement::create(tbodyTag, &document());
     Node* referenceElement = lastBody() ? lastBody()->nextSibling() : 0;
 
     insertBefore(body, referenceElement);
@@ -166,7 +166,7 @@ PassRefPtr<HTMLElement> HTMLTableElement::createCaption()
 {
     if (HTMLTableCaptionElement* existingCaption = caption())
         return existingCaption;
-    RefPtr<HTMLTableCaptionElement> caption = HTMLTableCaptionElement::create(captionTag, document());
+    RefPtr<HTMLTableCaptionElement> caption = HTMLTableCaptionElement::create(captionTag, &document());
     setCaption(caption, IGNORE_EXCEPTION);
     return caption.release();
 }
@@ -218,15 +218,15 @@ PassRefPtr<HTMLElement> HTMLTableElement::insertRow(int index, ExceptionState& e
     else {
         parent = lastBody();
         if (!parent) {
-            RefPtr<HTMLTableSectionElement> newBody = HTMLTableSectionElement::create(tbodyTag, document());
-            RefPtr<HTMLTableRowElement> newRow = HTMLTableRowElement::create(document());
+            RefPtr<HTMLTableSectionElement> newBody = HTMLTableSectionElement::create(tbodyTag, &document());
+            RefPtr<HTMLTableRowElement> newRow = HTMLTableRowElement::create(&document());
             newBody->appendChild(newRow, es);
             appendChild(newBody.release(), es);
             return newRow.release();
         }
     }
 
-    RefPtr<HTMLTableRowElement> newRow = HTMLTableRowElement::create(document());
+    RefPtr<HTMLTableRowElement> newRow = HTMLTableRowElement::create(&document());
     parent->insertBefore(newRow, row.get(), es);
     return newRow.release();
 }
@@ -317,7 +317,7 @@ void HTMLTableElement::collectStyleForPresentationAttribute(const QualifiedName&
     else if (name == backgroundAttr) {
         String url = stripLeadingAndTrailingHTMLSpaces(value);
         if (!url.isEmpty())
-            style->setProperty(CSSProperty(CSSPropertyBackgroundImage, CSSImageValue::create(document()->completeURL(url).string())));
+            style->setProperty(CSSProperty(CSSPropertyBackgroundImage, CSSImageValue::create(document().completeURL(url).string())));
     } else if (name == valignAttr) {
         if (!value.isEmpty())
             addPropertyToPresentationAttributeStyle(style, CSSPropertyVerticalAlign, value);
@@ -576,7 +576,7 @@ void HTMLTableElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) cons
 {
     HTMLElement::addSubresourceAttributeURLs(urls);
 
-    addSubresourceURL(urls, document()->completeURL(getAttribute(backgroundAttr)));
+    addSubresourceURL(urls, document().completeURL(getAttribute(backgroundAttr)));
 }
 
 }