Requesting M-62 merge for https://chromium-review.googlesource.com/c/chromium/src/+/714488.

This merge is very safe since it only changes a debug WebUI page which non-dogfooders will never open.

This bug requires manual review: We are only 4 days from stable.
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), bhthompson@(ChromeOS), abdulsyed@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

We need to see this landed in ToT and verified there first (e.g. through a Chrome OS PFQ), then we can review for 62. 

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e4d602a2795bcc08cd67b2415ef8622f3759d60b

commit e4d602a2795bcc08cd67b2415ef8622f3759d60b
Author: Kyle Horimoto <khorimoto@google.com>
Date: Thu Oct 12 20:11:56 2017

[CrOS Tether] ProximityAuth debug UI: Add "Save Logs" button.

This button replaces the "Copy to Clipboard" button, which was difficult
to use because it required later pasting the logs to another file.

Now, the logs are automatically saved to a file so that they can be
shared easily by dogfooders.

Change-Id: I412b6121cca82190b27e3182f29ee9e09587a761
Bug:  773900 , 672263
Reviewed-on: https://chromium-review.googlesource.com/714488
Reviewed-by: Tim Song <tengs@chromium.org>
Commit-Queue: Tim Song <tengs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#508428}
[modify] https://crrev.com/e4d602a2795bcc08cd67b2415ef8622f3759d60b/components/proximity_auth/webui/resources/common.css
[modify] https://crrev.com/e4d602a2795bcc08cd67b2415ef8622f3759d60b/components/proximity_auth/webui/resources/logs.js
[modify] https://crrev.com/e4d602a2795bcc08cd67b2415ef8622f3759d60b/components/proximity_auth/webui/resources/proximity_auth.html

Hey Bernie - actually, I just talked to jhawkins@, who suggested we do not merge this change into M-62 after all. Sorry for the noise!

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

If all merges have been completed, please remove any remaining Merge-Approved labels from this issue.

Thanks for your time! To disable nags, add the Disable-Nags label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

This change was merged before the M-63 branch date, so there is no need to cherry-pick it to M-63. Thanks!