GitLab

Module sizes are required for lookup by the ModuleCache, so ensure they
are provided and remove the constructor that allows construction without
a size.

Bug: 931418
Change-Id: Ibe3c1512196030de80c4785812a3ff31c55eeec8
Reviewed-on: https://chromium-review.googlesource.com/c/1478175
Commit-Queue: Mike Wittman <wittman@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Reviewed-by: Charlie Andrews <charliea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636542}