Rename some things around incremental marking triggers

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 46 matching lines @@
 
   inline bool IsComplete() { return state() == COMPLETE; }
 
   inline bool IsReadyToOverApproximateWeakClosure() const {
     return request_type_ == OVERAPPROXIMATION &&
            !weak_closure_was_overapproximated_;
   }
 
   GCRequestType request_type() const { return request_type_; }
 
-  bool WorthActivating();
+  bool CanBeActivated();
 
-  bool ShouldActivate();
+  bool ShouldActivateEvenWithoutIdleNotification();
 
   bool WasActivated();
 
   void Start();
 
   void Stop();
 
   void MarkObjectGroups();
 
   void PrepareForScavenge();
@@ skipping 181 matching lines @@
   int weak_closure_approximation_rounds_;
 
   GCRequestType request_type_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IncrementalMarking);
 };
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_INCREMENTAL_MARKING_H_