When clearing filled call target caches we should go back to the

test/cctest/test-heap.cc

Index: test/cctest/test-heap.cc
===================================================================
--- test/cctest/test-heap.cc	(revision 19457)
+++ test/cctest/test-heap.cc	(working copy)
@@ -2867,9 +2867,10 @@
   SimulateIncrementalMarking();
   CcTest::heap()->CollectAllGarbage(Heap::kNoGCFlags);
 
+  // Make sure we go back to the premonomorphic cache state.
   CHECK_EQ(2, feedback_vector->length());
-  CHECK(feedback_vector->get(0)->IsTheHole());
-  CHECK(feedback_vector->get(1)->IsTheHole());
+  CHECK(feedback_vector->get(0)->IsNull());
+  CHECK(feedback_vector->get(1)->IsNull());
 }