Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/svg/SVGFilterElement.h

Index: third_party/WebKit/Source/core/svg/SVGFilterElement.h
diff --git a/third_party/WebKit/Source/core/svg/SVGFilterElement.h b/third_party/WebKit/Source/core/svg/SVGFilterElement.h
index cdbf29534f7847c1a8b7da162f88d74a8f259278..66c8b223dd4a74d0e6f51cf9408d69ce06b59df0 100644
--- a/third_party/WebKit/Source/core/svg/SVGFilterElement.h
+++ b/third_party/WebKit/Source/core/svg/SVGFilterElement.h
@@ -39,7 +39,7 @@ namespace blink {
 class SVGFilterElement final : public SVGElement,
                                public SVGURIReference {
     DEFINE_WRAPPERTYPEINFO();
-    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(SVGFilterElement);
+    USING_GARBAGE_COLLECTED_MIXIN(SVGFilterElement);
 public:
     DECLARE_NODE_FACTORY(SVGFilterElement);
     DECLARE_VIRTUAL_TRACE();
@@ -66,14 +66,14 @@ private:
 
     bool selfHasRelativeLengths() const override;
 
-    RefPtrWillBeMember<SVGAnimatedLength> m_x;
-    RefPtrWillBeMember<SVGAnimatedLength> m_y;
-    RefPtrWillBeMember<SVGAnimatedLength> m_width;
-    RefPtrWillBeMember<SVGAnimatedLength> m_height;
-    RefPtrWillBeMember<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>> m_filterUnits;
-    RefPtrWillBeMember<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>> m_primitiveUnits;
+    Member<SVGAnimatedLength> m_x;
+    Member<SVGAnimatedLength> m_y;
+    Member<SVGAnimatedLength> m_width;
+    Member<SVGAnimatedLength> m_height;
+    Member<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>> m_filterUnits;
+    Member<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>> m_primitiveUnits;
 
-    WillBeHeapHashSet<RefPtrWillBeMember<Node>> m_clientsToAdd;
+    HeapHashSet<Member<Node>> m_clientsToAdd;
 };
 
 } // namespace blink