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

src/heap/mark-compact-inl.h

 // Copyright 2012 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_HEAP_MARK_COMPACT_INL_H_
 #define V8_HEAP_MARK_COMPACT_INL_H_
 
 #include "src/heap/mark-compact.h"
 #include "src/heap/remembered-set.h"
 #include "src/isolate.h"
@@ skipping 61 matching lines @@
 void CodeFlusher::AddCandidate(SharedFunctionInfo* shared_info) {
   if (GetNextCandidate(shared_info) == nullptr) {
     SetNextCandidate(shared_info, shared_function_info_candidates_head_);
     shared_function_info_candidates_head_ = shared_info;
   }
 }
 
 
 void CodeFlusher::AddCandidate(JSFunction* function) {
   DCHECK(function->code() == function->shared()->code());
-  if (function->next_function_link()->IsUndefined()) {
+  if (function->next_function_link()->IsUndefined(isolate_)) {
     SetNextCandidate(function, jsfunction_candidates_head_);
     jsfunction_candidates_head_ = function;
   }
 }
 
 
 JSFunction** CodeFlusher::GetNextCandidateSlot(JSFunction* candidate) {
   return reinterpret_cast<JSFunction**>(
       HeapObject::RawField(candidate, JSFunction::kNextFunctionLinkOffset));
 }
 
 
 JSFunction* CodeFlusher::GetNextCandidate(JSFunction* candidate) {
   Object* next_candidate = candidate->next_function_link();
   return reinterpret_cast<JSFunction*>(next_candidate);
 }
 
 
 void CodeFlusher::SetNextCandidate(JSFunction* candidate,
                                    JSFunction* next_candidate) {
   candidate->set_next_function_link(next_candidate, UPDATE_WEAK_WRITE_BARRIER);
 }
 
 
 void CodeFlusher::ClearNextCandidate(JSFunction* candidate, Object* undefined) {
-  DCHECK(undefined->IsUndefined());
+  DCHECK(undefined->IsUndefined(candidate->GetIsolate()));
   candidate->set_next_function_link(undefined, SKIP_WRITE_BARRIER);
 }
 
 
 SharedFunctionInfo* CodeFlusher::GetNextCandidate(
     SharedFunctionInfo* candidate) {
   Object* next_candidate = candidate->code()->gc_metadata();
   return reinterpret_cast<SharedFunctionInfo*>(next_candidate);
 }
 
@@ skipping 55 matching lines @@
     }
     if (object != nullptr) return object;
   }
   return nullptr;
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_MARK_COMPACT_INL_H_