remove most uses of Isolate::Current in arch specific files

src/objects-visiting-inl.h

Index: src/objects-visiting-inl.h
diff --git a/src/objects-visiting-inl.h b/src/objects-visiting-inl.h
index e90c74c80e7a8f73e01f3070aa1711f6cd9e6574..46cc9d7989297adb4763f878179c77f49f07e387 100644
--- a/src/objects-visiting-inl.h
+++ b/src/objects-visiting-inl.h
@@ -848,8 +848,9 @@ void Code::CodeIterateBody(ObjectVisitor* v) {
   IteratePointer(v, kTypeFeedbackInfoOffset);
 
   RelocIterator it(this, mode_mask);
+  Isolate* isolate = this->GetIsolate();
   for (; !it.done(); it.next()) {
-    it.rinfo()->Visit(v);
+    it.rinfo()->Visit(isolate, v);
   }
 }