Oilpan: Prepare to move RenderObject and RenderObjectChildList to Oilpan heap.

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 104 matching lines @@
     , m_updateWidgetsTimer(this, &FrameView::updateWidgetsTimerFired)
     , m_isTransparent(false)
     , m_baseBackgroundColor(Color::white)
     , m_mediaType("screen")
     , m_overflowStatusDirty(true)
     , m_viewportRenderer(0)
     , m_wasScrolledByUser(false)
     , m_inProgrammaticScroll(false)
     , m_safeToPropagateScrollToParent(true)
     , m_isTrackingPaintInvalidations(false)
-    , m_scrollCorner(0)
+    , m_scrollCorner(nullptr)
     , m_shouldAutoSize(false)
     , m_inAutoSize(false)
     , m_didRunAutosize(false)
     , m_hasSoftwareFilters(false)
     , m_visibleContentScaleFactor(1)
     , m_inputEventsScaleFactorForEmulation(1)
     , m_layoutSizeFixedToFrameSize(true)
     , m_didScrollTimer(this, &FrameView::didScrollTimerFired)
 {
     ASSERT(m_frame);
@@ skipping 144 matching lines @@
     Scrollbar* horizontalBar = horizontalScrollbar();
     if (horizontalBar && horizontalBar->isCustomScrollbar())
         setHasHorizontalScrollbar(false);
 
     Scrollbar* verticalBar = verticalScrollbar();
     if (verticalBar && verticalBar->isCustomScrollbar())
         setHasVerticalScrollbar(false);
 
     if (m_scrollCorner) {
         m_scrollCorner->destroy();
-        m_scrollCorner = 0;
+        m_scrollCorner = nullptr;
     }
 }
 
 void FrameView::recalculateScrollbarOverlayStyle()
 {
     ScrollbarOverlayStyle oldOverlayStyle = scrollbarOverlayStyle();
     ScrollbarOverlayStyle overlayStyle = ScrollbarOverlayStyleDefault;
 
     Color backgroundColor = documentBackgroundColor();
     // Reduce the background color from RGB to a lightness value
@@ skipping 769 matching lines @@
     m_widgets.add(object);
 }
 
 void FrameView::removeWidget(RenderWidget* object)
 {
     m_widgets.remove(object);
 }
 
 void FrameView::updateWidgetPositions()
 {
-    Vector<RefPtr<RenderWidget> > widgets;
+    WillBeHeapVector<RefPtrWillBeMember<RenderWidget> > widgets;
     copyToVector(m_widgets, widgets);
 
     // Script or plugins could detach the frame so abort processing if that happens.
 
     for (size_t i = 0; i < widgets.size() && renderView(); ++i)
         widgets[i]->updateWidgetPosition();
 
     for (size_t i = 0; i < widgets.size() && renderView(); ++i)
         widgets[i]->widgetPositionsUpdated();
 }
@@ skipping 1422 matching lines @@
         }
     }
 
     if (cornerStyle) {
         if (!m_scrollCorner)
             m_scrollCorner = RenderScrollbarPart::createAnonymous(doc);
         m_scrollCorner->setStyle(cornerStyle.release());
         invalidateScrollCorner(cornerRect);
     } else if (m_scrollCorner) {
         m_scrollCorner->destroy();
-        m_scrollCorner = 0;
+        m_scrollCorner = nullptr;
     }
 
     ScrollView::updateScrollCorner();
 }
 
 void FrameView::paintScrollCorner(GraphicsContext* context, const IntRect& cornerRect)
 {
     if (context->updatingControlTints()) {
         updateScrollCorner();
         return;
@@ skipping 730 matching lines @@
 void FrameView::willRemoveScrollbar(Scrollbar* scrollbar, ScrollbarOrientation orientation)
 {
     ScrollableArea::willRemoveScrollbar(scrollbar, orientation);
     if (AXObjectCache* cache = axObjectCache()) {
         cache->remove(scrollbar);
         cache->handleScrollbarUpdate(this);
     }
 }
 
 } // namespace blink