Only store innermost array offset in VariableLocation Separate entries will be generated for each innermost array of arrays of arrays in the variable tables. Because of this VariableLocation actually only needs to store the innermost array index. BUG=angleproject:2125 TEST=angle_end2end_tests Change-Id: Id1ee35b3cecfc011d96b58e43cf0b1cccbfed408 Reviewed-on: https://chromium-review.googlesource.com/741742 Commit-Queue: Olli Etuaho <oetuaho@nvidia.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>