Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/dom/IdTargetObserverRegistry.h

Index: third_party/WebKit/Source/core/dom/IdTargetObserverRegistry.h
diff --git a/third_party/WebKit/Source/core/dom/IdTargetObserverRegistry.h b/third_party/WebKit/Source/core/dom/IdTargetObserverRegistry.h
index ddb604174c20f255e8684d7bb0c8486b8016b603..10db431a5b0a4347869fbf0bd88c921c764eefd5 100644
--- a/third_party/WebKit/Source/core/dom/IdTargetObserverRegistry.h
+++ b/third_party/WebKit/Source/core/dom/IdTargetObserverRegistry.h
@@ -36,12 +36,11 @@ namespace blink {
 
 class IdTargetObserver;
 
-class IdTargetObserverRegistry final : public NoBaseWillBeGarbageCollectedFinalized<IdTargetObserverRegistry> {
+class IdTargetObserverRegistry final : public GarbageCollectedFinalized<IdTargetObserverRegistry> {
     WTF_MAKE_NONCOPYABLE(IdTargetObserverRegistry);
-    USING_FAST_MALLOC_WILL_BE_REMOVED(IdTargetObserverRegistry);
     friend class IdTargetObserver;
 public:
-    static PassOwnPtrWillBeRawPtr<IdTargetObserverRegistry> create();
+    static RawPtr<IdTargetObserverRegistry> create();
     DECLARE_TRACE();
     void notifyObservers(const AtomicString& id);
     bool hasObservers(const AtomicString& id) const;
@@ -52,10 +51,10 @@ private:
     void removeObserver(const AtomicString& id, IdTargetObserver*);
     void notifyObserversInternal(const AtomicString& id);
 
-    typedef WillBeHeapHashSet<RawPtrWillBeMember<IdTargetObserver>> ObserverSet;
-    typedef WillBeHeapHashMap<StringImpl*, OwnPtrWillBeMember<ObserverSet>> IdToObserverSetMap;
+    typedef HeapHashSet<Member<IdTargetObserver>> ObserverSet;
+    typedef HeapHashMap<StringImpl*, Member<ObserverSet>> IdToObserverSetMap;
     IdToObserverSetMap m_registry;
-    RawPtrWillBeMember<ObserverSet> m_notifyingObserversInSet;
+    Member<ObserverSet> m_notifyingObserversInSet;
 };
 
 inline void IdTargetObserverRegistry::notifyObservers(const AtomicString& id)