GitLab

This CL eliminates the redundant css rules for paper-button in favor of reusing the styling in the shared cr_elements location.

Bug: 740758
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ieba6ab6bf03e2c063a52323ecacaafc5919e4dfa
Reviewed-on: https://chromium-review.googlesource.com/577027Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Scott Chen <scottchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488425}