[Isolates] Avoid dereferencing Isolate::Current() to check oddball identities...

src/heap-inl.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 488 matching lines @@
   Verify();
 }
 
 
 void Heap::ClearInstanceofCache() {
   set_instanceof_cache_function(HEAP->the_hole_value());
 }
 
 
 Object* Heap::ToBoolean(bool condition) {
-  return condition ? HEAP->true_value() : HEAP->false_value();
+  return condition ? true_value() : false_value();
 }
 
 
 void Heap::CompletelyClearInstanceofCache() {
-  set_instanceof_cache_map(HEAP->the_hole_value());
-  set_instanceof_cache_function(HEAP->the_hole_value());
+  set_instanceof_cache_map(the_hole_value());
+  set_instanceof_cache_function(the_hole_value());
 }
 
 
 Object* TranscendentalCache::Get(Type type, double input) {
   SubCache* cache = caches_[type];
   if (cache == NULL) {
     caches_[type] = cache = new SubCache(type);
   }
   return cache->Get(input);
 }
@@ skipping 37 matching lines @@
 #ifdef DEBUG
   UpdateLiveObjectCount(obj);
 #endif
   obj->SetMark();
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_INL_H_