Revert "Revert "Load app images""

This reverts commit 1bc977cf2f8199311a97f2ba9431a184540e3e9c.

Bug: 22858531

Change-Id: Ide00bf3a73a02cba3bb364177204ad1b13f70295
diff --git a/runtime/mirror/class_loader.h b/runtime/mirror/class_loader.h
index c2a65d6..1957e13 100644
--- a/runtime/mirror/class_loader.h
+++ b/runtime/mirror/class_loader.h
@@ -63,7 +63,10 @@
  private:
   // Visit instance fields of the class loader as well as its associated classes.
   // Null class loader is handled by ClassLinker::VisitClassRoots.
-  template <VerifyObjectFlags kVerifyFlags, typename Visitor>
+  template <bool kVisitClasses,
+            VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
+            ReadBarrierOption kReadBarrierOption = kWithReadBarrier,
+            typename Visitor>
   void VisitReferences(mirror::Class* klass, const Visitor& visitor)
       SHARED_REQUIRES(Locks::mutator_lock_)
       REQUIRES(!Locks::classlinker_classes_lock_);