Flush out potential leaks of Failure objects

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 2869f2bc0a44c60551a48ce9f649f66338c5c5f7..701712be32bfd1119cdf5019717ed45bb32e7284 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -773,7 +773,9 @@ class MaybeObject BASE_EMBEDDED {
     return reinterpret_cast<Failure*>(this);
   }
   inline Object* ToObjectUnchecked() {
-    ASSERT(!IsFailure());
+    // TODO(jkummerow): Turn this back into an ASSERT when we can be certain
+    // that it never fires in Release mode in the wild.
+    CHECK(!IsFailure());
     return reinterpret_cast<Object*>(this);
   }
   inline Object* ToObjectChecked() {