Oilpan: Remove most WillBe types from the code base

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

Index: third_party/WebKit/Source/core/dom/DOMTokenList.h
diff --git a/third_party/WebKit/Source/core/dom/DOMTokenList.h b/third_party/WebKit/Source/core/dom/DOMTokenList.h
index e93e20c43d3e5e9b82d1ff641aafc39cd483684d..6e7b5fc324b490c315bab1be8bbea482d28ee866 100644
--- a/third_party/WebKit/Source/core/dom/DOMTokenList.h
+++ b/third_party/WebKit/Source/core/dom/DOMTokenList.h
@@ -37,7 +37,7 @@ namespace blink {
 class Element;
 class ExceptionState;
 
-class CORE_EXPORT DOMTokenListObserver : public WillBeGarbageCollectedMixin {
+class CORE_EXPORT DOMTokenListObserver : public GarbageCollectedMixin {
 public:
     // Called when the value property is set, even if the tokens in
     // the set have not changed.
@@ -46,15 +46,14 @@ public:
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 };
 
-class CORE_EXPORT DOMTokenList : public RefCountedWillBeGarbageCollectedFinalized<DOMTokenList>,
+class CORE_EXPORT DOMTokenList : public GarbageCollectedFinalized<DOMTokenList>,
     public ScriptWrappable, public ValueIterable<String> {
     DEFINE_WRAPPERTYPEINFO();
-    USING_FAST_MALLOC_WILL_BE_REMOVED(DOMTokenList);
     WTF_MAKE_NONCOPYABLE(DOMTokenList);
 public:
-    static PassRefPtrWillBeRawPtr<DOMTokenList> create(DOMTokenListObserver* observer = nullptr)
+    static RawPtr<DOMTokenList> create(DOMTokenListObserver* observer = nullptr)
     {
-        return adoptRefWillBeNoop(new DOMTokenList(observer));
+        return new DOMTokenList(observer);
     }
 
     virtual ~DOMTokenList() { }
@@ -112,7 +111,7 @@ private:
     IterationSource* startIteration(ScriptState*, ExceptionState&) override;
     SpaceSplitString m_tokens;
     AtomicString m_value;
-    RawPtrWillBeWeakMember<DOMTokenListObserver> m_observer;
+    WeakMember<DOMTokenListObserver> m_observer;
 };
 
 } // namespace blink