Remove tons of OILPAN.

sky/engine/core/html/canvas/HitRegion.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/html/canvas/HitRegion.h"
 
 #include "core/rendering/RenderBoxModelObject.h"
 
 namespace blink {
@@ skipping 13 matching lines @@
 bool HitRegion::contains(const LayoutPoint& point) const
 {
     return m_path.contains(point, m_fillRule);
 }
 
 void HitRegion::removePixels(const Path& clearArea)
 {
     m_path.subtractPath(clearArea);
 }
 
-void HitRegion::trace(Visitor* visitor)
-{
-    visitor->trace(m_control);
-}
-
 void HitRegionManager::addHitRegion(PassRefPtr<HitRegion> passHitRegion)
 {
     RefPtr<HitRegion> hitRegion = passHitRegion;
 
     m_hitRegionList.add(hitRegion);
 
     if (!hitRegion->id().isEmpty())
         m_hitRegionIdMap.set(hitRegion->id(), hitRegion);
 
     if (hitRegion->control())
@@ skipping 77 matching lines @@
     }
 
     return 0;
 }
 
 unsigned HitRegionManager::getHitRegionsCount() const
 {
     return m_hitRegionList.size();
 }
 
-void HitRegionManager::trace(Visitor* visitor)
-{
-#if ENABLE(OILPAN)
-    visitor->trace(m_hitRegionList);
-    visitor->trace(m_hitRegionIdMap);
-    visitor->trace(m_hitRegionControlMap);
-#endif
-}
-
 DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(HitRegionManager)
 
 } // namespace blink