Oilpan: Remove most WillBe types from the code base

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

Index: third_party/WebKit/Source/core/dom/DOMSettableTokenList.h
diff --git a/third_party/WebKit/Source/core/dom/DOMSettableTokenList.h b/third_party/WebKit/Source/core/dom/DOMSettableTokenList.h
index 9dd7fd260945c47d55a40980d1214c44da74fa9e..9febb0ccab2a7e3854ba5fb07ff767f4881c02bb 100644
--- a/third_party/WebKit/Source/core/dom/DOMSettableTokenList.h
+++ b/third_party/WebKit/Source/core/dom/DOMSettableTokenList.h
@@ -35,7 +35,7 @@ namespace blink {
 
 class ExceptionState;
 
-class CORE_EXPORT DOMSettableTokenListObserver : public WillBeGarbageCollectedMixin {
+class CORE_EXPORT DOMSettableTokenListObserver : public GarbageCollectedMixin {
 public:
     // Called when the value property is set, even if the tokens in
     // the set have not changed.
@@ -51,11 +51,10 @@ class CORE_EXPORT DOMSettableTokenList
 #endif
     {
     DEFINE_WRAPPERTYPEINFO();
-    USING_FAST_MALLOC_WILL_BE_REMOVED(DOMSettableTokenList);
 public:
-    static PassRefPtrWillBeRawPtr<DOMSettableTokenList> create(DOMSettableTokenListObserver* observer = nullptr)
+    static RawPtr<DOMSettableTokenList> create(DOMSettableTokenListObserver* observer = nullptr)
     {
-        return adoptRefWillBeNoop(new DOMSettableTokenList(observer));
+        return (new DOMSettableTokenList(observer));
     }
     ~DOMSettableTokenList() override;
 
@@ -83,7 +82,7 @@ private:
 
     AtomicString m_value;
     SpaceSplitString m_tokens;
-    RawPtrWillBeWeakMember<DOMSettableTokenListObserver> m_observer;
+    WeakMember<DOMSettableTokenListObserver> m_observer;
 };
 
 } // namespace blink