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

Source/core/rendering/RenderView.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * 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,
@@ skipping 18 matching lines @@
 #include "core/html/HTMLIFrameElement.h"
 #include "core/page/Page.h"
 #include "core/rendering/ColumnInfo.h"
 #include "core/rendering/FlowThreadController.h"
 #include "core/rendering/GraphicsContextAnnotator.h"
 #include "core/rendering/HitTestResult.h"
 #include "core/rendering/RenderFlowThread.h"
 #include "core/rendering/RenderGeometryMap.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderPart.h"
+#include "core/rendering/RenderQuote.h"
 #include "core/rendering/RenderSelectionInfo.h"
 #include "core/rendering/compositing/CompositedLayerMapping.h"
 #include "core/rendering/compositing/RenderLayerCompositor.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/TraceEvent.h"
 #include "platform/geometry/FloatQuad.h"
 #include "platform/geometry/TransformState.h"
 #include "platform/graphics/GraphicsContext.h"
 
 namespace blink {
 
 RenderView::RenderView(Document* document)
     : RenderBlockFlow(document)
     , m_frameView(document->view())
-    , m_selectionStart(0)
-    , m_selectionEnd(0)
+    , m_selectionStart(nullptr)
+    , m_selectionEnd(nullptr)
     , m_selectionStartPos(-1)
     , m_selectionEndPos(-1)
     , m_pageLogicalHeight(0)
     , m_pageLogicalHeightChanged(false)
     , m_layoutState(0)
-    , m_renderQuoteHead(0)
+    , m_renderQuoteHead(nullptr)
     , m_renderCounterCount(0)
     , m_hitTestCount(0)
 {
     // init RenderObject attributes
     setInline(false);
 
     m_minPreferredLogicalWidth = 0;
     m_maxPreferredLogicalWidth = 0;
 
     setPreferredLogicalWidthsDirty(MarkOnlyThis);
 
     setPositionState(AbsolutePosition); // to 0,0 :)
 }
 
 RenderView::~RenderView()
 {
 }
 
+void RenderView::trace(Visitor* visitor)
+{
+    visitor->trace(m_selectionStart);
+    visitor->trace(m_selectionEnd);
+    visitor->trace(m_renderQuoteHead);
+    RenderBlockFlow::trace(visitor);
+}
+
 bool RenderView::hitTest(const HitTestRequest& request, HitTestResult& result)
 {
     return hitTest(request, result.hitTestLocation(), result);
 }
 
 bool RenderView::hitTest(const HitTestRequest& request, const HitTestLocation& location, HitTestResult& result)
 {
     TRACE_EVENT0("blink", "RenderView::hitTest");
     m_hitTestCount++;
 
@@ skipping 903 matching lines @@
     return viewWidth(IncludeScrollbars) / scale;
 }
 
 double RenderView::layoutViewportHeight() const
 {
     float scale = m_frameView ? m_frameView->frame().pageZoomFactor() : 1;
     return viewHeight(IncludeScrollbars) / scale;
 }
 
 } // namespace blink