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

Source/core/html/HTMLAppletElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 86 matching lines @@
 
 void HTMLAppletElement::updateWidget(PluginCreationOption)
 {
     setNeedsWidgetUpdate(false);
     // FIXME: This should ASSERT isFinishedParsingChildren() instead.
     if (!isFinishedParsingChildren())
         return;
 
     RenderEmbeddedObject* renderer = renderEmbeddedObject();
 
-    Frame* frame = document()->frame();
+    Frame* frame = document().frame();
     ASSERT(frame);
 
     LayoutUnit contentWidth = renderer->style()->width().isFixed() ? LayoutUnit(renderer->style()->width().value()) :
         renderer->width() - renderer->borderAndPaddingWidth();
     LayoutUnit contentHeight = renderer->style()->height().isFixed() ? LayoutUnit(renderer->style()->height().value()) :
         renderer->height() - renderer->borderAndPaddingHeight();
 
     Vector<String> paramNames;
     Vector<String> paramValues;
 
     paramNames.append("code");
     paramValues.append(getAttribute(codeAttr).string());
 
     const AtomicString& codeBase = getAttribute(codebaseAttr);
     if (!codeBase.isNull()) {
-        KURL codeBaseURL = document()->completeURL(codeBase);
-        if (!document()->securityOrigin()->canDisplay(codeBaseURL)) {
+        KURL codeBaseURL = document().completeURL(codeBase);
+        if (!document().securityOrigin()->canDisplay(codeBaseURL)) {
             FrameLoader::reportLocalLoadFailed(frame, codeBaseURL.string());
             return;
         }
         const char javaAppletMimeType[] = "application/x-java-applet";
-        if (!document()->contentSecurityPolicy()->allowObjectFromSource(codeBaseURL)
-            || !document()->contentSecurityPolicy()->allowPluginType(javaAppletMimeType, javaAppletMimeType, codeBaseURL))
+        if (!document().contentSecurityPolicy()->allowObjectFromSource(codeBaseURL)
+            || !document().contentSecurityPolicy()->allowPluginType(javaAppletMimeType, javaAppletMimeType, codeBaseURL))
             return;
         paramNames.append("codeBase");
         paramValues.append(codeBase.string());
     }
 
-    const AtomicString& name = document()->isHTMLDocument() ? getNameAttribute() : getIdAttribute();
+    const AtomicString& name = document().isHTMLDocument() ? getNameAttribute() : getIdAttribute();
     if (!name.isNull()) {
         paramNames.append("name");
         paramValues.append(name.string());
     }
 
     const AtomicString& archive = getAttribute(archiveAttr);
     if (!archive.isNull()) {
         paramNames.append("archive");
         paramValues.append(archive.string());
     }
 
     paramNames.append("baseURL");
-    KURL baseURL = document()->baseURL();
+    KURL baseURL = document().baseURL();
     paramValues.append(baseURL.string());
 
     const AtomicString& mayScript = getAttribute(mayscriptAttr);
     if (!mayScript.isNull()) {
         paramNames.append("mayScript");
         paramValues.append(mayScript.string());
     }
 
     for (Node* child = firstChild(); child; child = child->nextSibling()) {
         if (!child->hasTagName(paramTag))
@@ skipping 15 matching lines @@
         if (!renderer->showsUnavailablePluginIndicator())
             renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginMissing);
         return;
     }
     frame->loader()->setContainsPlugins();
     renderer->setWidget(widget);
 }
 
 bool HTMLAppletElement::canEmbedJava() const
 {
-    if (document()->isSandboxed(SandboxPlugins))
+    if (document().isSandboxed(SandboxPlugins))
         return false;
 
-    Settings* settings = document()->settings();
+    Settings* settings = document().settings();
     if (!settings)
         return false;
 
     if (!settings->isJavaEnabled())
         return false;
 
     return true;
 }
 
 }