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* Prepares extension child for state update in backend
 (crrev.com/c/2089775).
* Updates button relaunches browser.
* Password button links to password check page.
* Safe browsing button links to security page.
* Extensions button opens extensions in new tab.

Bug: 1015841
Change-Id: I522ce5080eda92ebcee6ce6d17303eb490a651c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2087677
Commit-Queue: Rainhard Findling <rainhard@chromium.org>
Reviewed-by: dpapad <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748019}