Remove almost all of Oilpan

sky/engine/core/css/CSSImageGeneratorValue.cpp

Index: sky/engine/core/css/CSSImageGeneratorValue.cpp
diff --git a/sky/engine/core/css/CSSImageGeneratorValue.cpp b/sky/engine/core/css/CSSImageGeneratorValue.cpp
index c8d3f0ececf3f4113835ae2218e78afe7b4dba9b..cb222683f62d5806c87c34d577398ac1d81c88a0 100644
--- a/sky/engine/core/css/CSSImageGeneratorValue.cpp
+++ b/sky/engine/core/css/CSSImageGeneratorValue.cpp
@@ -45,14 +45,7 @@ CSSImageGeneratorValue::~CSSImageGeneratorValue()
 void CSSImageGeneratorValue::addClient(RenderObject* renderer, const IntSize& size)
 {
     ASSERT(renderer);
-#if !ENABLE(OILPAN)
     ref();
-#else
-    if (m_clients.isEmpty()) {
-        ASSERT(!m_keepAlive);
-        m_keepAlive = adoptPtr(new Persistent<CSSImageGeneratorValue>(this));
-    }
-#endif
 
     if (!size.isEmpty())
         m_sizes.add(size);