Release Oilpan heap singletons prior to LSan leak detection.

third_party/WebKit/Source/core/css/CSSPrimitiveValue.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2012 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 140 matching lines @@
     case CSSValueWebkitLink:
     case CSSValueWebkitActivelink:
     case CSSValueCurrentcolor:
         return true;
     default:
         return false;
     }
 }
 
 using CSSTextCache = WillBePersistentHeapHashMap<RawPtrWillBeWeakMember<const CSSPrimitiveValue>, String>;
+
+#if ENABLE(OILPAN) && defined(LEAK_SANITIZER)
+
+namespace {
+// With LSan, wrap the persistent cache so that the registration of the
+// (per-thread) static reference can be done.
+class CSSTextCacheWrapper {
+public:
+    CSSTextCacheWrapper()
+    {
+        m_cache.registerAsStaticReference();
+    }
+
+    operator CSSTextCache&() { return m_cache; }
+
+private:
+    CSSTextCache m_cache;
+};
+
+}
+#else
+using CSSTextCacheWrapper = CSSTextCache;
+#endif
+
 static CSSTextCache& cssTextCache()
 {
-    AtomicallyInitializedStaticReference(ThreadSpecific<CSSTextCache>, cache, new ThreadSpecific<CSSTextCache>());
+    AtomicallyInitializedStaticReference(ThreadSpecific<CSSTextCacheWrapper>, cache, new ThreadSpecific<CSSTextCacheWrapper>);
     return *cache;
 }
 
 CSSPrimitiveValue::UnitType CSSPrimitiveValue::typeWithCalcResolved() const
 {
     if (type() != UnitType::Calc)
         return type();
 
     switch (m_value.calc->category()) {
     case CalcAngle:
@@ skipping 664 matching lines @@
         visitor->trace(m_value.calc);
         break;
     default:
         break;
     }
 #endif
     CSSValue::traceAfterDispatch(visitor);
 }
 
 } // namespace blink