Record time to navigation/tab-closed after HTTP-bad warning

Record time to navigation/tab-closed after HTTP-bad warning

This CL adds UMA metrics to record the time after displaying a
password/credit-card field on an HTTP page until the user navigates or
closes the tab.

By comparing these metrics for users who see the omnibox warning and
those who only get a console warning, we hope to get some idea of how
the HTTP-bad omnibox warning affects user behavior.

BUG=663924
Review-Url: https://codereview.chromium.org/2499243002
Cr-Commit-Position: refs/heads/master@{#433411}
(cherry picked from commit 5c563b099036a96fc1e2b0ede70ec83d14012bc6)

Committed: https://chromium.googlesource.com/chromium/src/+/7ba25d3abc53cffa400753ab36d73c72887f15e6

[estark, 2016-11-21 18:29:32]

Description was changed from

==========
Record time to navigation/tab-closed after HTTP-bad warning

This CL adds UMA metrics to record the time after displaying a
password/credit-card field on an HTTP page until the user navigates or
closes the tab.

By comparing these metrics for users who see the omnibox warning and
those who only get a console warning, we hope to get some idea of how
the HTTP-bad omnibox warning affects user behavior.

BUG=663924

Review-Url: https://codereview.chromium.org/2499243002
Cr-Commit-Position: refs/heads/master@{#433411}
(cherry picked from commit 5c563b099036a96fc1e2b0ede70ec83d14012bc6)
==========

to

==========
Record time to navigation/tab-closed after HTTP-bad warning

This CL adds UMA metrics to record the time after displaying a
password/credit-card field on an HTTP page until the user navigates or
closes the tab.

By comparing these metrics for users who see the omnibox warning and
those who only get a console warning, we hope to get some idea of how
the HTTP-bad omnibox warning affects user behavior.

BUG=663924

Review-Url: https://codereview.chromium.org/2499243002
Cr-Commit-Position: refs/heads/master@{#433411}
(cherry picked from commit 5c563b099036a96fc1e2b0ede70ec83d14012bc6)

Committed:
https://chromium.googlesource.com/chromium/src/+/7ba25d3abc53cffa400753ab36d7...
==========

[estark, 2016-11-21 18:29:34]

Committed patchset #1 (id:1) manually as
7ba25d3abc53cffa400753ab36d73c72887f15e6.