[automerger] Fix DynamicRefTable::load security bug am: 8cf0f988b0 am: d65dbf91ce am: aeb2fc64d9 am: 0938689606 am: 6f76fbfc69 am: 69b14d2a1a

Change-Id: I6e7ab766f6c88e61b8c2993a2f1420efc177319a