Actually the previous UI was explicitly setting the "Cancel" button font color to gray. But that is not in accordance with the new spec. See updated screenshot.

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	or_alternative.png 16.6 KB View Download

Yeah, let's 

- keep the margins 8dp between each button
- convert RESUME to a primary button (blue fill with white text)
- CANCEL is WAI (white fill with blue text) 

- PAUSE should remain as a white fill and blue text

Screenshots after proposed change at https://crrev.com/c/1101923:

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	DownloadsResumed.png 19.7 KB View Download

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	DownloadsCancelled.png 13.5 KB View Download

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	DownloadsDangerous.png 14.9 KB View Download

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	DownloadsDangerous2.png 18.2 KB View Download

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4308ace4619507a2502f713746a699636885876f

commit 4308ace4619507a2502f713746a699636885876f
Author: rbpotter <rbpotter@chromium.org>
Date: Mon Jun 18 19:24:07 2018

WebUI MD Refresh: Refresh downloads buttons

Bug:  850719 
Cq-Include-Trybots: luci.chromium.try:closure_compilation
Change-Id: I63fb963d90fe8b240fce80b52f8b852d5c77f311
Reviewed-on: https://chromium-review.googlesource.com/1101923
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568101}
[modify] https://crrev.com/4308ace4619507a2502f713746a699636885876f/chrome/browser/resources/md_downloads/item.html
[modify] https://crrev.com/4308ace4619507a2502f713746a699636885876f/chrome/browser/resources/md_downloads/item.js