[oilpan] Rename visit to mark.

Source/wtf/TypeTraits.h

  /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 67 matching lines @@
 
     template<typename T> struct IsFloatingPoint     { static const bool value = false; };
     template<> struct IsFloatingPoint<float>        { static const bool value = true; };
     template<> struct IsFloatingPoint<double>       { static const bool value = true; };
     template<> struct IsFloatingPoint<long double>  { static const bool value = true; };
 
     template<typename T> struct ValidArgumentTypeTrait { static const bool value = true; };
 
     template<typename T> struct IsArithmetic        { static const bool value = IsInteger<T>::value || IsFloatingPoint<T>::value; };
 
-    template<typename T> struct NeedsVisiting       { static const bool value = false; };
+    template<typename T> struct NeedsTracing        { static const bool value = false; };
     template<typename T> struct IsWeak              { static const bool value = false; };
 
     // IsPod is misnamed as it doesn't cover all plain old data (pod) types.
     // Specifically, it doesn't allow for enums or for structs.
     template <typename T> struct IsPod              { static const bool value = IsArithmetic<T>::value; };
     template <typename P> struct IsPod<P*>          { static const bool value = true; };
 
     template<typename T> class IsConvertibleToInteger {
         // Avoid "possible loss of data" warning when using Microsoft's C++ compiler
         // by not converting int's to doubles.
@@ skipping 158 matching lines @@
         static const bool value = IsPod<RemoveConstVolatile<T> >::value;
     };
     template <typename T> struct HasTrivialDestructor {
         static const bool value = IsPod<RemoveConstVolatile<T> >::value;
     };
 #endif
 
 } // namespace WTF
 
 #endif // TypeTraits_h