The final proposal seemed certain to retain one key provision: moving the company toward one share, one vote. Kalanick and early investors like Benchmark have outsize voting power, which is expected to be diminished as part of the deal. The proposal also set a deadline for the company to go public in the next two years. A draft on Tuesday retains many of the major provisions, two people said. The complicated measures are contained in a document that’s as long as a Congressional bill, at more than 100 pages.