Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/core/frame/Frame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 118 matching lines @@
 {
     RefPtr<Frame> frame = adoptRef(new Frame(frameInit));
     if (!frame->ownerElement())
         frame->page()->setMainFrame(frame);
     InspectorInstrumentation::frameAttachedToParent(frame.get());
     return frame.release();
 }
 
 Frame::~Frame()
 {
-    setView(0);
+    setView(nullptr);
     loader().clear();
-    setDOMWindow(0);
+    setDOMWindow(nullptr);
 
     // FIXME: We should not be doing all this work inside the destructor
 
 #ifndef NDEBUG
     frameCounter.decrement();
 #endif
 
     disconnectOwnerElement();
 
     HashSet<FrameDestructionObserver*>::iterator stop = m_destructionObservers.end();
@@ skipping 196 matching lines @@
         parent->loader().checkLoadComplete();
 
     HashSet<FrameDestructionObserver*>::iterator stop = m_destructionObservers.end();
     for (HashSet<FrameDestructionObserver*>::iterator it = m_destructionObservers.begin(); it != stop; ++it)
         (*it)->willDetachFrameHost();
 
     // FIXME: Page should take care of updating focus/scrolling instead of Frame.
     // FIXME: It's unclear as to why this is called more than once, but it is,
     // so page() could be NULL.
     if (page() && page()->focusController().focusedFrame() == this)
-        page()->focusController().setFocusedFrame(0);
+        page()->focusController().setFocusedFrame(nullptr);
 
     if (page() && page()->scrollingCoordinator() && m_view)
         page()->scrollingCoordinator()->willDestroyScrollableArea(m_view.get());
 
     script().clearScriptObjects();
 }
 
 void Frame::detachFromFrameHost()
 {
     // We should never be detatching the page during a Layout.
@@ skipping 62 matching lines @@
 
     if (contentRenderer())
         result = eventHandler().hitTestResultAtPoint(pt, HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent);
     return result.innerNode() ? &result.innerNode()->document() : 0;
 }
 
 PassRefPtr<Range> Frame::rangeForPoint(const IntPoint& framePoint)
 {
     VisiblePosition position = visiblePositionForPoint(framePoint);
     if (position.isNull())
-        return 0;
+        return nullptr;
 
     VisiblePosition previous = position.previous();
     if (previous.isNotNull()) {
         RefPtr<Range> previousCharacterRange = makeRange(previous, position);
         LayoutRect rect = editor().firstRectForRange(previousCharacterRange.get());
         if (rect.contains(framePoint))
             return previousCharacterRange.release();
     }
 
     VisiblePosition next = position.next();
     if (RefPtr<Range> nextCharacterRange = makeRange(position, next)) {
         LayoutRect rect = editor().firstRectForRange(nextCharacterRange.get());
         if (rect.contains(framePoint))
             return nextCharacterRange.release();
     }
 
-    return 0;
+    return nullptr;
 }
 
 void Frame::createView(const IntSize& viewportSize, const Color& backgroundColor, bool transparent,
     ScrollbarMode horizontalScrollbarMode, bool horizontalLock,
     ScrollbarMode verticalScrollbarMode, bool verticalLock)
 {
     ASSERT(this);
     ASSERT(page());
 
     bool isMainFrame = this->isMainFrame();
 
     if (isMainFrame && view())
         view()->setParentVisible(false);
 
-    setView(0);
+    setView(nullptr);
 
     RefPtr<FrameView> frameView;
     if (isMainFrame) {
         frameView = FrameView::create(this, viewportSize);
 
         // The layout size is set by WebViewImpl to support @viewport
         frameView->setLayoutSizeFixedToFrameSize(false);
     } else
         frameView = FrameView::create(this);
 
@@ skipping 243 matching lines @@
 {
     if (!m_host)
         return 0;
 
     double ratio = m_host->deviceScaleFactor();
     ratio *= pageZoomFactor();
     return ratio;
 }
 
 } // namespace WebCore