Closure compile import_controller_unittest

 - remove import_controller_unittest.html
 - add BUILD rules to auto-generate and compile this unittest
 - update comments, remove unused functions, code re-format
 - fix all Closure compile errors

No change in test behavior.

Bug: 914197
Change-Id: Ida12573fc640dcc97325b1240bedbbf970ff1f35
Reviewed-on: https://chromium-review.googlesource.com/c/1375301
Reviewed-by: Stuart Langley <slangley@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616501}
4 files changed