Merge "Call removeMessages() only for certain operations in...

                // Can't delete op from mCurrentOperations here. waitUntilOperationComplete may be

                // called after we receive cancel here. We need this op's state there.

                // Remove all pending timeout messages for this operation type.

                // Remove all pending timeout messages of types OP_TYPE_BACKUP_WAIT and

                // OP_TYPE_RESTORE_WAIT. On the other hand, OP_TYPE_BACKUP cannot time out and

                // doesn't require cancellation.

                if (op.type == OP_TYPE_BACKUP_WAIT || op.type == OP_TYPE_RESTORE_WAIT) {

                    mBackupHandler.removeMessages(getMessageIdForOperationType(op.type));

                }

            }

            mCurrentOpLock.notifyAll();

        }