GitLab

Previously some compositing layout tests used references which contained
styles and elements which were not enough different from the test. This
increased chances that the same bug affects both the test and the
reference and the test still passes.

This CL removes unnecessary styles and elements from references to make
them more different from the tests.

Change-Id: I7c452c27f44fb34460217697ce1dd9bf98456d48
Reviewed-on: https://chromium-review.googlesource.com/726542
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#510243}