Fix idle step marking after 9d7ebc.

src/heap/incremental-marking.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_INCREMENTAL_MARKING_H_
 #define V8_HEAP_INCREMENTAL_MARKING_H_
 
 
 #include "src/execution.h"
 #include "src/heap/mark-compact.h"
@@ skipping 21 matching lines @@
                 ForceCompletionAction force_completion_)
         : completion_action(complete_action_),
           force_marking(force_marking_),
           force_completion(force_completion_) {}
 
     CompletionAction completion_action;
     ForceMarkingAction force_marking;
     ForceCompletionAction force_completion;
   };
 
-  static StepActions NoForcedStepActions();
+  static StepActions IdleStepActions();
 
   explicit IncrementalMarking(Heap* heap);
 
   static void Initialize();
 
   State state() {
     DCHECK(state_ == STOPPED || FLAG_incremental_marking);
     return state_;
   }
 
@@ skipping 210 matching lines @@
   GCRequestType request_type_;
 
   GCCallbackFlags gc_callback_flags_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IncrementalMarking);
 };
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_INCREMENTAL_MARKING_H_