patch: requestbackoff class and logic for table updates r=provos,sr=darin,a181=mtschrep git-svn-id: svn://10.0.0.236/branches/MOZILLA_1_8_BRANCH@208552 18797224-902f-48f8-a5cc-f745e15eee43
patch: requestbackoff class and logic for table updates r=provos,sr=darin,a181=mtschrep git-svn-id: svn://10.0.0.236/branches/MOZILLA_1_8_BRANCH@208552 18797224-902f-48f8-a5cc-f745e15eee43