Add a host parameter to ObjectVisitor methods.

src/heap/scavenger.cc

Index: src/heap/scavenger.cc
diff --git a/src/heap/scavenger.cc b/src/heap/scavenger.cc
index 72f8c1b786fbd1e4fc134e410a366c58525bd7f1..d23cb6fcf978e80f958d222df0d7084a4b7e9502 100644
--- a/src/heap/scavenger.cc
+++ b/src/heap/scavenger.cc
@@ -460,13 +460,6 @@ void Scavenger::SelectScavengingVisitorsTable() {
 
 Isolate* Scavenger::isolate() { return heap()->isolate(); }
 
-void RootScavengeVisitor::VisitPointer(Object** p) { ScavengePointer(p); }
-
-void RootScavengeVisitor::VisitPointers(Object** start, Object** end) {
-  // Copy all HeapObject pointers in [start, end)
-  for (Object** p = start; p < end; p++) ScavengePointer(p);
-}
-
 void RootScavengeVisitor::VisitRootPointer(Root root, Object** p) {
   ScavengePointer(p);
 }