Oilpan: fix build after r197063, move HitTestCache to the heap.

Source/core/layout/LayoutView.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * 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 40 matching lines @@
     explicit LayoutView(Document*);
     virtual ~LayoutView();
     void willBeDestroyed() override;
 
     bool hitTest(HitTestResult&);
 
     // Returns the total count of calls to HitTest, for testing.
     unsigned hitTestCount() const { return m_hitTestCount; }
     unsigned hitTestCacheHits() const { return m_hitTestCacheHits; }
 
-    void clearHitTestCache() { m_hitTestCache.clear(); }
+    void clearHitTestCache() { m_hitTestCache->clear(); }
 
     virtual const char* name() const override { return "LayoutView"; }
 
     virtual bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectLayoutView || LayoutBlockFlow::isOfType(type); }
 
     virtual DeprecatedPaintLayerType layerTypeRequired() const override { return NormalDeprecatedPaintLayer; }
 
     virtual bool isChildAllowed(LayoutObject*, const ComputedStyle&) const override;
 
     virtual void layout() override;
@@ skipping 139 matching lines @@
     bool m_pageLogicalHeightChanged;
     LayoutState* m_layoutState;
     OwnPtr<DeprecatedPaintLayerCompositor> m_compositor;
     RefPtr<IntervalArena> m_intervalArena;
 
     LayoutQuote* m_layoutQuoteHead;
     unsigned m_layoutCounterCount;
 
     unsigned m_hitTestCount;
     unsigned m_hitTestCacheHits;
-    HitTestCache m_hitTestCache;
+    OwnPtrWillBePersistent<HitTestCache> m_hitTestCache;
 
     OwnPtrWillBePersistent<PendingSelection> m_pendingSelection;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutView, isLayoutView());
 
 // Suspends the LayoutState cached offset and clipRect optimization. Used under transforms
 // that cannot be represented by LayoutState (common in SVG) and when manipulating the layout
 // tree during layout in ways that can trigger paint invalidation of a non-child (e.g. when a list item
 // moves its list marker around). Note that even when disabled, LayoutState is still used to
@@ skipping 15 matching lines @@
             m_paintInvalidationState->m_cachedOffsetsEnabled = true;
     }
 private:
     const PaintInvalidationState* m_paintInvalidationState;
     bool m_didDisable;
 };
 
 } // namespace blink
 
 #endif // LayoutView_h