Implemented ObjectProxy.CheckInvariants.
Implemented ObjectProxy.CheckInvariants.

GoogleCloudPlatform/gcsfuse,mbrukman/gcsfuse,GoogleCloudPlatform/gcsfuse,BanzaiMan/gcsfuse,jacobsa/ratelimit,kahing/gcsfuse,jacobsa/timeutil,GoogleCloudPlatform/gcsfuse,BanzaiMan/gcsfuse