OOPIF: Instrument TabAndMouseNavigation for WIN Flakiness.

Adding temporary logging to the test to figure out why the test is
flaky. This commit will likely be reverted once it shows up as flaky.

BUG=713977
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/2837213002
Cr-Commit-Position: refs/heads/master@{#466846}
1 file changed