Introduce IsUndefined(Isolate*) and IsTheHole(Isolate*)

src/heap/incremental-marking.cc

Index: src/heap/incremental-marking.cc
diff --git a/src/heap/incremental-marking.cc b/src/heap/incremental-marking.cc
index c250b90b1c99d260be6ae137d212ca02bc97db35..ad1a3b114a997cf31ee268c8c53e8f0b9500c06d 100644
--- a/src/heap/incremental-marking.cc
+++ b/src/heap/incremental-marking.cc
@@ -930,12 +930,12 @@ void IncrementalMarking::Hurry() {
   }
 
   Object* context = heap_->native_contexts_list();
-  while (!context->IsUndefined()) {
+  while (!context->IsUndefined(heap_->isolate())) {
     // GC can happen when the context is not fully initialized,
     // so the cache can be undefined.
     HeapObject* cache = HeapObject::cast(
         Context::cast(context)->get(Context::NORMALIZED_MAP_CACHE_INDEX));
-    if (!cache->IsUndefined()) {
+    if (!cache->IsUndefined(heap_->isolate())) {
       MarkBit mark_bit = Marking::MarkBitFrom(cache);
       if (Marking::IsGrey(mark_bit)) {
         Marking::GreyToBlack(mark_bit);