am a61b2ef1: am e9056405: am 6ed6b682: am f593c0a5: am ee8847c1: am 145af9e8: am 39cee9f1: Merge "Remove all field initializers and let ctor call clear()."

* commit 'a61b2ef1d7b372b858b6aae07cf3eebbf62184b8':