Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/core/page/Page.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All Rights Reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 106 matching lines @@
     , m_editorClient(pageClients.editorClient)
     , m_validationMessageClient(0)
     , m_spellCheckerClient(pageClients.spellCheckerClient)
     , m_storageClient(pageClients.storageClient)
     , m_subframeCount(0)
     , m_openedByDOM(false)
     , m_tabKeyCyclesThroughElements(true)
     , m_defersLoading(false)
     , m_pageScaleFactor(1)
     , m_deviceScaleFactor(1)
-    , m_group(0)
+    , m_group(nullptr)
     , m_timerAlignmentInterval(DOMTimer::visiblePageAlignmentInterval())
     , m_visibilityState(PageVisibilityStateVisible)
     , m_isCursorVisible(true)
 #ifndef NDEBUG
     , m_isPainting(false)
 #endif
     , m_frameHost(FrameHost::create(*this))
 {
     ASSERT(m_editorClient);
 
     ASSERT(!allPages().contains(this));
     allPages().add(this);
 
 #ifndef NDEBUG
     pageCounter.increment();
 #endif
 }
 
 Page::~Page()
 {
-    m_mainFrame->setView(0);
+    m_mainFrame->setView(nullptr);
     clearPageGroup();
     allPages().remove(this);
 
     for (Frame* frame = mainFrame(); frame; frame = frame->tree().traverseNext()) {
         frame->willDetachFrameHost();
         frame->detachFromFrameHost();
     }
 
     m_inspectorController->inspectedPageDestroyed();
 
@@ skipping 63 matching lines @@
 void Page::setOpenedByDOM()
 {
     m_openedByDOM = true;
 }
 
 void Page::clearPageGroup()
 {
     if (!m_group)
         return;
     m_group->removePage(this);
-    m_group = 0;
+    m_group = nullptr;
 }
 
 void Page::setGroupType(PageGroupType type)
 {
     clearPageGroup();
 
     switch (type) {
     case PrivatePageGroup:
         m_group = PageGroup::create();
         break;
@@ skipping 37 matching lines @@
     PluginData::refresh();
 
     Vector<RefPtr<Frame> > framesNeedingReload;
 
     HashSet<Page*>::iterator end = allPages().end();
     for (HashSet<Page*>::iterator it = allPages().begin(); it != end; ++it) {
         Page* page = *it;
 
         // Clear out the page's plug-in data.
         if (page->m_pluginData)
-            page->m_pluginData = 0;
+            page->m_pluginData = nullptr;
 
         if (!reload)
             continue;
 
         for (Frame* frame = (*it)->mainFrame(); frame; frame = frame->tree().traverseNext()) {
             if (frame->document()->containsPlugins())
                 framesNeedingReload.append(frame);
         }
     }
 
@@ skipping 255 matching lines @@
     , spellCheckerClient(0)
     , storageClient(0)
 {
 }
 
 Page::PageClients::~PageClients()
 {
 }
 
 } // namespace WebCore