Rename ASSERT* to DCHECK*.

src/objects-visiting.cc

Index: src/objects-visiting.cc
diff --git a/src/objects-visiting.cc b/src/objects-visiting.cc
index 9ff97fcdbe646a15e893567cf4000ba210e32ce3..207f99e5de33bc3ed5d64b6b930443ed6bfa71de 100644
--- a/src/objects-visiting.cc
+++ b/src/objects-visiting.cc
@@ -218,7 +218,7 @@ Object* VisitWeakList(Heap* heap,
         head = retained;
       } else {
         // Subsequent elements in the list.
-        ASSERT(tail != NULL);
+        DCHECK(tail != NULL);
         WeakListVisitor<T>::SetWeakNext(tail, retained);
         if (record_slots) {
           Object** next_slot =
@@ -227,7 +227,7 @@ Object* VisitWeakList(Heap* heap,
         }
       }
       // Retained object is new tail.
-      ASSERT(!retained->IsUndefined());
+      DCHECK(!retained->IsUndefined());
       candidate = reinterpret_cast<T*>(retained);
       tail = candidate;