[heap] Introduce HeapVisitor interface.

src/heap/scavenger.cc

Index: src/heap/scavenger.cc
diff --git a/src/heap/scavenger.cc b/src/heap/scavenger.cc
index d23cb6fcf978e80f958d222df0d7084a4b7e9502..792b91f2d5092bfd48963def592b43af2fc25ecc 100644
--- a/src/heap/scavenger.cc
+++ b/src/heap/scavenger.cc
@@ -36,7 +36,7 @@ class ScavengingVisitor : public StaticVisitorBase {
     table_.Register(kVisitByteArray, &EvacuateByteArray);
     table_.Register(kVisitFixedArray, &EvacuateFixedArray);
     table_.Register(kVisitFixedDoubleArray, &EvacuateFixedDoubleArray);
-    table_.Register(kVisitFixedTypedArray, &EvacuateFixedTypedArray);
+    table_.Register(kVisitFixedTypedArrayBase, &EvacuateFixedTypedArray);
     table_.Register(kVisitFixedFloat64Array, &EvacuateFixedFloat64Array);
     table_.Register(kVisitJSArrayBuffer,
                     &ObjectEvacuationStrategy<POINTER_OBJECT>::Visit);
@@ -446,11 +446,10 @@ void Scavenger::SelectScavengingVisitorsTable() {
       // can't be evacuated into evacuation candidate but
       // short-circuiting violates this assumption.
       scavenging_visitors_table_.Register(
-          StaticVisitorBase::kVisitShortcutCandidate,
-          scavenging_visitors_table_.GetVisitorById(
-              StaticVisitorBase::kVisitConsString));
+          kVisitShortcutCandidate,
+          scavenging_visitors_table_.GetVisitorById(kVisitConsString));
       scavenging_visitors_table_.Register(
-          StaticVisitorBase::kVisitThinString,
+          kVisitThinString,
           &ScavengingVisitor<TRANSFER_MARKS, LOGGING_AND_PROFILING_DISABLED>::
               EvacuateThinStringNoShortcut);
     }