Revert ("Chromium 284577 needs a mitigation CL added." (svn-id 16742))

src/heap-inl.h

Index: src/heap-inl.h
diff --git a/src/heap-inl.h b/src/heap-inl.h
index 6c33cfcfeebdf1ff6baa04c79d941df72a945da0..e11dec87944201fe28215398dff040b3a4342651 100644
--- a/src/heap-inl.h
+++ b/src/heap-inl.h
@@ -525,8 +525,8 @@ void Heap::ScavengeObject(HeapObject** p, HeapObject* object) {
     return;
   }
 
-  // TODO(hpayer): temporary debugging code for issue 284577.
-  CHECK(object->map() != object->GetHeap()->allocation_memento_map());
+  // AllocationMementos are unrooted and shouldn't survive a scavenge
+  ASSERT(object->map() != object->GetHeap()->allocation_memento_map());
   // Call the slow part of scavenge object.
   return ScavengeObjectSlow(p, object);
 }