The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7f82c88750d41d0f34d9c3aba823af1008b78f1d

commit 7f82c88750d41d0f34d9c3aba823af1008b78f1d
Author: Scott Chen <scottchen@chromium.org>
Date: Mon Jul 17 23:52:59 2017

WebUI: move paper-button styling to shared location.

This allows WebUI sections outside of settings/ to reuse the same styles.

Bug:  740758 
Change-Id: Iefbdff0b219a3ced28b02098a0f05bbe25f83357
Reviewed-on: https://chromium-review.googlesource.com/571189
Commit-Queue: Scott Chen <scottchen@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487289}
[modify] https://crrev.com/7f82c88750d41d0f34d9c3aba823af1008b78f1d/chrome/browser/resources/md_extensions/pack_dialog.html
[modify] https://crrev.com/7f82c88750d41d0f34d9c3aba823af1008b78f1d/chrome/browser/resources/md_extensions/shortcut_input.html
[modify] https://crrev.com/7f82c88750d41d0f34d9c3aba823af1008b78f1d/chrome/browser/resources/md_extensions/toolbar.html
[modify] https://crrev.com/7f82c88750d41d0f34d9c3aba823af1008b78f1d/chrome/browser/resources/settings/chrome_cleanup_page/chrome_cleanup_page.html
[modify] https://crrev.com/7f82c88750d41d0f34d9c3aba823af1008b78f1d/chrome/browser/resources/settings/controls/controlled_button.html
[modify] https://crrev.com/7f82c88750d41d0f34d9c3aba823af1008b78f1d/chrome/browser/resources/settings/settings_shared_css.html
[modify] https://crrev.com/7f82c88750d41d0f34d9c3aba823af1008b78f1d/chrome/browser/resources/settings/settings_vars_css.html
[add] https://crrev.com/7f82c88750d41d0f34d9c3aba823af1008b78f1d/ui/webui/resources/cr_elements/paper_button_style_css.html
[modify] https://crrev.com/7f82c88750d41d0f34d9c3aba823af1008b78f1d/ui/webui/resources/cr_elements/shared_vars_css.html
[modify] https://crrev.com/7f82c88750d41d0f34d9c3aba823af1008b78f1d/ui/webui/resources/cr_elements_resources.grdp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9bf6753c39cca68127922a079c11e07097202205

commit 9bf6753c39cca68127922a079c11e07097202205
Author: Scott Chen <scottchen@chromium.org>
Date: Thu Jul 20 21:56:32 2017

MD Extensions: reuse the shared paper-button styling.

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/577027
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Scott Chen <scottchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488425}
[modify] https://crrev.com/9bf6753c39cca68127922a079c11e07097202205/chrome/browser/resources/md_extensions/item.html
[modify] https://crrev.com/9bf6753c39cca68127922a079c11e07097202205/chrome/browser/resources/md_extensions/load_error.html
[modify] https://crrev.com/9bf6753c39cca68127922a079c11e07097202205/chrome/browser/resources/md_extensions/pack_dialog.html
[modify] https://crrev.com/9bf6753c39cca68127922a079c11e07097202205/chrome/browser/resources/md_extensions/toolbar.html