Replace all remaining Oddball checks with new function

src/prototype.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PROTOTYPE_H_
 #define V8_PROTOTYPE_H_
 
 #include "src/isolate.h"
 #include "src/objects.h"
 
@@ skipping 41 matching lines @@
         where_to_end_(where_to_end),
         is_at_end_(false),
         seen_proxies_(0) {
     if (where_to_start == START_AT_PROTOTYPE) Advance();
   }
 
   explicit PrototypeIterator(Map* receiver_map)
       : object_(receiver_map->prototype()),
         isolate_(receiver_map->GetIsolate()),
         where_to_end_(END_AT_NULL),
-        is_at_end_(object_->IsNull()) {}
+        is_at_end_(object_->IsNull(isolate_)) {}
 
   explicit PrototypeIterator(Handle<Map> receiver_map)
       : object_(NULL),
         handle_(handle(receiver_map->prototype(), receiver_map->GetIsolate())),
         isolate_(receiver_map->GetIsolate()),
         where_to_end_(END_AT_NULL),
-        is_at_end_(handle_->IsNull()) {}
+        is_at_end_(handle_->IsNull(isolate_)) {}
 
   ~PrototypeIterator() {}
 
   bool HasAccess() const {
     // We can only perform access check in the handlified version of the
     // PrototypeIterator.
     DCHECK(!handle_.is_null());
     if (handle_->IsAccessCheckNeeded()) {
       return isolate_->MayAccess(handle(isolate_->context()),
                                  Handle<JSObject>::cast(handle_));
@@ skipping 27 matching lines @@
     AdvanceIgnoringProxies();
   }
 
   void AdvanceIgnoringProxies() {
     Object* object = handle_.is_null() ? object_ : *handle_;
     Map* map = HeapObject::cast(object)->map();
 
     Object* prototype = map->prototype();
     is_at_end_ = where_to_end_ == END_AT_NON_HIDDEN
                      ? !map->has_hidden_prototype()
-                     : prototype->IsNull();
+                     : prototype->IsNull(isolate_);
 
     if (handle_.is_null()) {
       object_ = prototype;
     } else {
       handle_ = handle(prototype, isolate_);
     }
   }
 
   // Returns false iff a call to JSProxy::GetPrototype throws.
   // TODO(neis): This should probably replace Advance().
@@ skipping 18 matching lines @@
     // we visit to an arbitrarily chosen large number.
     seen_proxies_++;
     if (seen_proxies_ > kProxyPrototypeLimit) {
       isolate_->Throw(
           *isolate_->factory()->NewRangeError(MessageTemplate::kStackOverflow));
       return false;
     }
     MaybeHandle<Object> proto =
         JSProxy::GetPrototype(Handle<JSProxy>::cast(handle_));
     if (!proto.ToHandle(&handle_)) return false;
-    is_at_end_ = where_to_end_ == END_AT_NON_HIDDEN || handle_->IsNull();
+    is_at_end_ =
+        where_to_end_ == END_AT_NON_HIDDEN || handle_->IsNull(isolate_);
     return true;
   }
 
   bool IsAtEnd() const { return is_at_end_; }
 
  private:
   Object* object_;
   Handle<Object> handle_;
   Isolate* isolate_;
   WhereToEnd where_to_end_;
   bool is_at_end_;
   int seen_proxies_;
 
   DISALLOW_COPY_AND_ASSIGN(PrototypeIterator);
 };
 
 
 }  // namespace internal
 
 }  // namespace v8
 
 #endif  // V8_PROTOTYPE_H_