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This replaces custom origin formatting code with the standard formatting routine for permissions dialogs (geolocation, usb, etc.)

Bug: 830177

Change-Id: I9bee4636a3095b561a1041d0228f9dc87e4504da
Reviewed-on: https://chromium-review.googlesource.com/c/1321049Reviewed-by: Takumi Fujimoto <takumif@chromium.org>
Commit-Queue: mark a. foltz <mfoltz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605948}