[oilpan] Rename visit to mark.

Source/wtf/VectorTraits.h

Index: Source/wtf/VectorTraits.h
diff --git a/Source/wtf/VectorTraits.h b/Source/wtf/VectorTraits.h
index 20bccc9890ba65855f1dfe3fcca8c171e2147b53..ec3a926408f51909dbec3fac1db6b6790ac8c6e0 100644
--- a/Source/wtf/VectorTraits.h
+++ b/Source/wtf/VectorTraits.h
@@ -46,7 +46,7 @@ namespace WTF {
         static const bool canCopyWithMemcpy = false;
         static const bool canFillWithMemset = false;
         static const bool canCompareWithMemcmp = false;
-        static const bool needsVisiting = NeedsVisiting<T>::value;
+        static const bool needsTracing = NeedsTracing<T>::value;
         static const bool isWeak = IsWeak<T>::value;
     };
 
@@ -60,7 +60,7 @@ namespace WTF {
         static const bool canCopyWithMemcpy = true;
         static const bool canFillWithMemset = sizeof(T) == sizeof(char);
         static const bool canCompareWithMemcmp = true;
-        static const bool needsVisiting = NeedsVisiting<T>::value;
+        static const bool needsTracing = NeedsTracing<T>::value;
         static const bool isWeak = IsWeak<T>::value;
     };
 
@@ -98,7 +98,7 @@ namespace WTF {
         static const bool canCopyWithMemcpy = FirstTraits::canCopyWithMemcpy && SecondTraits::canCopyWithMemcpy;
         static const bool canFillWithMemset = false;
         static const bool canCompareWithMemcmp = FirstTraits::canCompareWithMemcmp && SecondTraits::canCompareWithMemcmp;
-        static const bool needsVisiting = FirstTraits::needsVisiting || SecondTraits::needsVisiting;
+        static const bool needsTracing = FirstTraits::needsTracing || SecondTraits::needsTracing;
         static const bool isWeak = FirstTraits::isWeak || SecondTraits::isWeak;
     };