Revert of [handles] Sanitize Handle and friends.

src/handles.cc

Index: src/handles.cc
diff --git a/src/handles.cc b/src/handles.cc
index ca23a6f75f711d5fd00f142b0f53860b5fee0428..d4153159861bd21cf00b01f64d6f1bc23a087422 100644
--- a/src/handles.cc
+++ b/src/handles.cc
@@ -8,34 +8,6 @@
 
 namespace v8 {
 namespace internal {
-
-#ifdef DEBUG
-bool HandleBase::IsDereferenceAllowed(DereferenceCheckMode mode) const {
-  DCHECK_NOT_NULL(location_);
-  Object* object = *location_;
-  if (object->IsSmi()) return true;
-  HeapObject* heap_object = HeapObject::cast(object);
-  Heap* heap = heap_object->GetHeap();
-  Object** roots_array_start = heap->roots_array_start();
-  if (roots_array_start <= location_ &&
-      location_ < roots_array_start + Heap::kStrongRootListLength &&
-      heap->RootCanBeTreatedAsConstant(
-          static_cast<Heap::RootListIndex>(location_ - roots_array_start))) {
-    return true;
-  }
-  if (!AllowHandleDereference::IsAllowed()) return false;
-  if (mode == INCLUDE_DEFERRED_CHECK &&
-      !AllowDeferredHandleDereference::IsAllowed()) {
-    // Accessing cells, maps and internalized strings is safe.
-    if (heap_object->IsCell()) return true;
-    if (heap_object->IsMap()) return true;
-    if (heap_object->IsInternalizedString()) return true;
-    return !heap->isolate()->IsDeferredHandle(location_);
-  }
-  return true;
-}
-#endif
-
 
 int HandleScope::NumberOfHandles(Isolate* isolate) {
   HandleScopeImplementer* impl = isolate->handle_scope_implementer();
@@ -95,7 +67,7 @@
 void HandleScope::ZapRange(Object** start, Object** end) {
   DCHECK(end - start <= kHandleBlockSize);
   for (Object** p = start; p != end; p++) {
-    *reinterpret_cast<Address*>(p) = kHandleZapValue;
+    *reinterpret_cast<Address*>(p) = v8::internal::kHandleZapValue;
   }
 }
 #endif