Oilpan: move custom element objects to the heap.

Source/core/dom/custom/CustomElementObserver.cpp

 /*
  * Copyright (C) 2013 Google 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
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/dom/custom/CustomElementObserver.h"
 
+#include "core/dom/Element.h"
+
 namespace WebCore {
 
-CustomElementObserver::ElementObserverMap& CustomElementObserver::elementObservers()
+// Maps elements to the observer watching them. At most one per
+// element at a time.
+typedef WillBeHeapHashMap<RawPtrWillBeWeakMember<Element>, RawPtrWillBeMember<CustomElementObserver> > ElementObserverMap;
+
+static ElementObserverMap& elementObservers()
 {
-    DEFINE_STATIC_LOCAL(ElementObserverMap, map, ());
-    return map;
+    DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<ElementObserverMap>, map, (adoptPtrWillBeNoop(new ElementObserverMap())));
+    return *map;
 }
 
 void CustomElementObserver::notifyElementDidFinishParsingChildren(Element* element)
 {
     ElementObserverMap::iterator it = elementObservers().find(element);
     if (it == elementObservers().end())
         return;
     it->value->elementDidFinishParsingChildren(element);
 }
 
@@ skipping 11 matching lines @@
     ASSERT_UNUSED(result, result.isNewEntry);
 }
 
 void CustomElementObserver::unobserve(Element* element)
 {
     CustomElementObserver* observer = elementObservers().take(element);
     ASSERT_UNUSED(observer, observer == this);
 }
 
 } // namespace WebCore