Oilpan: Reapply: Remove all the RefPtrs and most of the raw pointers to style

Source/heap/Handle.h

Index: Source/heap/Handle.h
diff --git a/Source/heap/Handle.h b/Source/heap/Handle.h
index 6528f37a9869384b272e0c7365ff8817697fa06c..448f3f973144504d50f1099ba5b64889c7e57bed 100644
--- a/Source/heap/Handle.h
+++ b/Source/heap/Handle.h
@@ -251,6 +251,13 @@ public:
     Persistent(T* raw) : m_raw(raw)
     {
         COMPILE_ASSERT_IS_GARBAGE_COLLECTED(T, NonGarbageCollectedObjectInPersistent);
+#ifndef NDEBUG
+        // For global persistent handles we cannot check that the
+        // pointer is in the heap because that would involve
+        // inspecting the heap of running threads.
+        bool isGlobalPersistent = WTF::IsSubclass<RootsAccessor, GlobalPersistents>::value;
+        ASSERT(!raw || isGlobalPersistent || ThreadStateFor<ThreadingTrait<T>::Affinity>::state()->contains(raw));
+#endif
     }
 
     Persistent(const Persistent& other) : m_raw(other)
@@ -423,6 +430,7 @@ public:
     Member(T* raw) : m_raw(raw)
     {
         COMPILE_ASSERT_IS_GARBAGE_COLLECTED(T, NonGarbageCollectedObjectInMember);
+        ASSERT(!raw || ThreadStateFor<ThreadingTrait<T>::Affinity>::state()->contains(raw));
     }
 
     Member(WTF::HashTableDeletedValueType) : m_raw(reinterpret_cast<T*>(-1))