Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/dom/custom/CustomElementMicrotaskDispatcher.h

Index: third_party/WebKit/Source/core/dom/custom/CustomElementMicrotaskDispatcher.h
diff --git a/third_party/WebKit/Source/core/dom/custom/CustomElementMicrotaskDispatcher.h b/third_party/WebKit/Source/core/dom/custom/CustomElementMicrotaskDispatcher.h
index 6a07de27b474732b54460eed8364a3e654666057..a81801b1b963f8c4673e6e23df20ffa0e3c328a1 100644
--- a/third_party/WebKit/Source/core/dom/custom/CustomElementMicrotaskDispatcher.h
+++ b/third_party/WebKit/Source/core/dom/custom/CustomElementMicrotaskDispatcher.h
@@ -14,10 +14,8 @@ namespace blink {
 
 class CustomElementCallbackQueue;
 
-class CustomElementMicrotaskDispatcher final : public NoBaseWillBeGarbageCollected<CustomElementMicrotaskDispatcher> {
-    USING_FAST_MALLOC_WILL_BE_REMOVED(CustomElementMicrotaskDispatcher);
+class CustomElementMicrotaskDispatcher final : public GarbageCollected<CustomElementMicrotaskDispatcher> {
     WTF_MAKE_NONCOPYABLE(CustomElementMicrotaskDispatcher);
-    DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(CustomElementMicrotaskDispatcher);
 public:
     static CustomElementMicrotaskDispatcher& instance();
 
@@ -43,7 +41,7 @@ private:
         DispatchingCallbacks
     } m_phase;
 
-    WillBeHeapVector<RawPtrWillBeMember<CustomElementCallbackQueue>> m_elements;
+    HeapVector<Member<CustomElementCallbackQueue>> m_elements;
 };
 
 } // namespace blink