Mark shouldMarkObject(), arenaForNormalPage() accessors as const.

third_party/WebKit/Source/platform/heap/InlinedGlobalMarkingVisitor.h

 // Copyright 2014 The Chromium 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 InlinedGlobalMarkingVisitor_h
 #define InlinedGlobalMarkingVisitor_h
 
 #include "platform/heap/MarkingVisitorImpl.h"
 
 namespace blink {
@@ skipping 29 matching lines @@
 
     template<typename T, void (T::*method)(Visitor*)>
     void registerWeakMembers(const T* obj)
     {
         Helper::template registerWeakMembers<T, method>(obj);
     }
 
 protected:
     // Methods to be called from MarkingVisitorImpl.
 
-    inline bool shouldMarkObject(const void*)
+    inline bool shouldMarkObject(const void*) const
     {
         // As this is global marking visitor, we need to mark all objects.
         return true;
     }
 
     inline Visitor::MarkingMode getMarkingMode() const
     {
         return Visitor::GlobalMarking;
     }
 
 private:
     static InlinedGlobalMarkingVisitor fromHelper(Helper* helper)
     {
         return *static_cast<InlinedGlobalMarkingVisitor*>(helper);
     }
 };
 
 inline void GarbageCollectedMixin::trace(InlinedGlobalMarkingVisitor)
 {
 }
 
 } // namespace blink
 
 #endif