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

src/heap/mark-compact.cc

 // 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.
 
 #include "src/heap/mark-compact.h"
 
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
 #include "src/base/sys-info.h"
 #include "src/code-stubs.h"
@@ skipping 1056 matching lines @@
         break;
       }
 
       candidate = next_candidate;
     }
   }
 }
 
 
 void CodeFlusher::EvictCandidate(JSFunction* function) {
-  DCHECK(!function->next_function_link()->IsUndefined());
+  DCHECK(!function->next_function_link()->IsUndefined(isolate_));
   Object* undefined = isolate_->heap()->undefined_value();
 
   // Make sure previous flushing decisions are revisited.
   isolate_->heap()->incremental_marking()->IterateBlackObject(function);
   isolate_->heap()->incremental_marking()->IterateBlackObject(
       function->shared());
 
   if (FLAG_trace_code_flushing) {
     PrintF("[code-flushing abandons closure: ");
     function->shared()->ShortPrint();
@@ skipping 2897 matching lines @@
     MarkBit mark_bit = Marking::MarkBitFrom(host);
     if (Marking::IsBlack(mark_bit)) {
       RelocInfo rinfo(isolate(), pc, RelocInfo::CODE_TARGET, 0, host);
       RecordRelocSlot(host, &rinfo, target);
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8