Bisect Info:
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Good build : 59.0.3056.0,  Revision Range - 460603
Bad build  : 59.0.3057.0,  Revision Range - 460966

After executing the per-revision bisect script , i got the following CL's between good and bad build versions
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https://chromium.googlesource.com/chromium/src/+log/75d1fbdea6f82d547d7eec45d659ab5491f24e7a..e6a2ed91fb2df3c4f234ca8824cfb570f902897c

The Suspecting CL:
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Review-Url: https://codereview.chromium.org/2783063002

dschuyler@- Could you please look into this issue, if it's related to your change?  if not could you please help us to reassign this issue to the right owner.

FYI, if you want the enter key to not automatically trigger the action-button you should add an ignore-enter-key attribute on the dialog, see 1 and 2.

[1] https://cs.chromium.org/chromium/src/ui/webui/resources/cr_elements/cr_dialog/cr_dialog.js?q=cr_dialog.js&sq=package:chromium&dr&l=36
[2] https://cs.chromium.org/chromium/src/chrome/browser/resources/settings/reset_page/powerwash_dialog.html?type=cs&q=ignore-enter-key&sq=package:chromium&l=14

Thanks but it looks like the enter key should close the dialog, because of the Done default button. Enter performs the default action, which is "Done". Is there some functionality that is failing, please undo my WontFix and tell me more if so.

The CL also mentioned that it intentionally adds the ability to use the Enter key to close the dialog so I'm marking this WAI, wontFix. If there's disagreement to that please let me or bettes@ know.