- Add extra checking when validating objects.

vm/verifier.cc

Index: vm/verifier.cc
===================================================================
--- vm/verifier.cc	(revision 7182)
+++ vm/verifier.cc	(working copy)
@@ -34,7 +34,7 @@
           !Dart::vm_isolate()->heap()->Contains(obj_addr)) {
         FATAL1("Invalid object pointer encountered 0x%lx\n", obj_addr);
       }
-      raw_obj->Validate();
+      raw_obj->Validate(isolate_);
     }
   }
 }
@@ -51,7 +51,7 @@
 void VerifyPointersVisitor::VerifyPointers() {
   NoGCScope no_gc;
   Isolate* isolate = Isolate::Current();
-  VerifyPointersVisitor visitor;
+  VerifyPointersVisitor visitor(isolate);
   // Visit all strongly reachable objects.
   isolate->VisitObjectPointers(&visitor,
                                false,  // skip prologue weak handles