Fix for 3303 MultithreadedParallelIsolates has a race condition.

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index df6392438de57d35cb801a3cdd243ea66904f4b6..7b7c9c9a705c17cde2489a8218b5dd98faa2cbe4 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -627,8 +627,9 @@ void Code::CodeVerify() {
                   kCodeAlignment));
   relocation_info()->ObjectVerify();
   Address last_gc_pc = NULL;
+  Isolate* isolate = GetIsolate();
   for (RelocIterator it(this); !it.done(); it.next()) {
-    it.rinfo()->Verify();
+    it.rinfo()->Verify(isolate);
     // Ensure that GC will not iterate twice over the same pointer.
     if (RelocInfo::IsGCRelocMode(it.rinfo()->rmode())) {
       CHECK(it.rinfo()->pc() != last_gc_pc);