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This change updates ChooserContextBase's GrantObjectPermission() method
to take url::Origins instead of GURLs. In the process the internal
GetWebsiteSetting() and SetWebsiteSetting() methods have also been
modified to take url::Origins.

This is part of a migration effort to remove GURL from the interface of
ChooserContextBase and its subclasses.

Bug: 951785
Change-Id: I88878374ca4c8c1d56cb6f05614fb76f70ac4f0b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1579477Reviewed-by: Raymes Khoury <raymes@chromium.org>
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653495}