Oilpan: prefer ENABLE(OILPAN).

Source/core/css/CSSImageGeneratorValue.cpp

 /*
  * Copyright (C) 2008 Apple Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 83 matching lines @@
 #endif
 }
 
 Image* CSSImageGeneratorValue::getImage(LayoutObject* renderer, const IntSize& size)
 {
     LayoutObjectSizeCountMap::iterator it = m_clients.find(renderer);
     if (it != m_clients.end()) {
         SizeAndCount& sizeCount = it->value;
         IntSize oldSize = sizeCount.size;
         if (oldSize != size) {
-#if !ENABLE_OILPAN

[sof, 2015/02/20 12:20:49]

The #if here is from 

 
https://codereview.chromium.org/143403009/diff2/1:250001/Source/core/css/CSSI...

i.e., from the time of when the policy of how to handle these no-op protections
was being discussed & settled.

-            RefPtr<CSSImageGeneratorValue> protect(this);
-#endif
+            RefPtrWillBeRawPtr<CSSImageGeneratorValue> protect(this);
             removeClient(renderer);
             addClient(renderer, size);
         }
     }
 
     // Don't generate an image for empty sizes.
     if (size.isEmpty())
         return 0;
 
     // Look up the image in our cache.
@@ skipping 104 matching lines @@
         break;
     case RadialGradientClass:
         toCSSRadialGradientValue(this)->loadSubimages(fetcher);
         break;
     default:
         ASSERT_NOT_REACHED();
     }
 }
 
 } // namespace blink