Oilpan: Remove most WillBe types from the code base

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

Index: third_party/WebKit/Source/core/dom/IdTargetObserverRegistry.cpp
diff --git a/third_party/WebKit/Source/core/dom/IdTargetObserverRegistry.cpp b/third_party/WebKit/Source/core/dom/IdTargetObserverRegistry.cpp
index 491950c91424d1c4d27d2b4e87ba8b74dcf5906f..85cdd6c482a43f10e46c49f4469e8fa7ebbfd518 100644
--- a/third_party/WebKit/Source/core/dom/IdTargetObserverRegistry.cpp
+++ b/third_party/WebKit/Source/core/dom/IdTargetObserverRegistry.cpp
@@ -29,9 +29,9 @@
 
 namespace blink {
 
-PassOwnPtrWillBeRawPtr<IdTargetObserverRegistry> IdTargetObserverRegistry::create()
+RawPtr<IdTargetObserverRegistry> IdTargetObserverRegistry::create()
 {
-    return adoptPtrWillBeNoop(new IdTargetObserverRegistry());
+    return new IdTargetObserverRegistry();
 }
 
 DEFINE_TRACE(IdTargetObserverRegistry)
@@ -49,7 +49,7 @@ void IdTargetObserverRegistry::addObserver(const AtomicString& id, IdTargetObser
 
     IdToObserverSetMap::AddResult result = m_registry.add(id.impl(), nullptr);
     if (result.isNewEntry)
-        result.storedValue->value = adoptPtrWillBeNoop(new ObserverSet());
+        result.storedValue->value = new ObserverSet();
 
     result.storedValue->value->add(observer);
 }
@@ -76,7 +76,7 @@ void IdTargetObserverRegistry::notifyObserversInternal(const AtomicString& id)
     if (!m_notifyingObserversInSet)
         return;
 
-    WillBeHeapVector<RawPtrWillBeMember<IdTargetObserver>> copy;
+    HeapVector<Member<IdTargetObserver>> copy;
     copyToVector(*m_notifyingObserversInSet, copy);
     for (const auto& observer : copy) {
         if (m_notifyingObserversInSet->contains(observer))