Fix inobject slack tracking for both subclassing and non-subclassing cases.

src/factory.cc

 // 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.
 
 #include "src/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 1635 matching lines @@
   array->set_elements(*elms);
   array->set_length(Smi::FromInt(length));
 }
 
 
 Handle<JSGeneratorObject> Factory::NewJSGeneratorObject(
     Handle<JSFunction> function) {
   DCHECK(function->shared()->is_generator());
   JSFunction::EnsureHasInitialMap(function);
   Handle<Map> map(function->initial_map());
-  DCHECK(map->instance_type() == JS_GENERATOR_OBJECT_TYPE);
+  DCHECK_EQ(JS_GENERATOR_OBJECT_TYPE, map->instance_type());
   CALL_HEAP_FUNCTION(
       isolate(),
       isolate()->heap()->AllocateJSObjectFromMap(*map),
       JSGeneratorObject);
 }
 
 
 Handle<JSArrayBuffer> Factory::NewJSArrayBuffer(SharedFlag shared,
                                                 PretenureFlag pretenure) {
   Handle<JSFunction> array_buffer_fun(
@@ skipping 659 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8