Oilpan: Add TraceEargerlyTrait for WeakPersistent and CrossThreadWeakPersistent

Source/platform/heap/TraceTraits.h

Index: Source/platform/heap/TraceTraits.h
diff --git a/Source/platform/heap/TraceTraits.h b/Source/platform/heap/TraceTraits.h
index 2c5b3ebfb28366fc7781f86cf80b710ce91522fc..eafe3ee4796360b877902252eb0eeec18d7e1d63 100644
--- a/Source/platform/heap/TraceTraits.h
+++ b/Source/platform/heap/TraceTraits.h
@@ -23,11 +23,13 @@
 namespace blink {
 
 template<typename T> class CrossThreadPersistent;
+template<typename T> class CrossThreadWeakPersistent;
 template<typename T> struct GCInfoTrait;
 class HeapObjectHeader;
 template<typename T> class Member;
 template<typename T> class TraceTrait;
 template<typename T> class WeakMember;
+template<typename T> class WeakPersistent;
 
 template<typename T, bool = NeedsAdjustAndMark<T>::value> class AdjustAndMarkTrait;
 
@@ -286,11 +288,23 @@ public:
 };
 
 template<typename T>
+class TraceEagerlyTrait<WeakPersistent<T>> {
+public:
+    static const bool value = TraceEagerlyTrait<T>::value;
+};
+
+template<typename T>
 class TraceEagerlyTrait<CrossThreadPersistent<T>> {
 public:
     static const bool value = TraceEagerlyTrait<T>::value;
 };
 
+template<typename T>
+class TraceEagerlyTrait<CrossThreadWeakPersistent<T>> {
+public:
+    static const bool value = TraceEagerlyTrait<T>::value;
+};
+
 template<typename ValueArg, size_t inlineCapacity> class HeapListHashSetAllocator;
 template<typename T, size_t inlineCapacity>
 class TraceEagerlyTrait<WTF::ListHashSetNode<T, HeapListHashSetAllocator<T, inlineCapacity>>> {