Fill forgotten fields in SessionDetails.

|focus_reason|, |client_source_for_metrics| and |should_do_learning| are
not filled in InputMethodMus::OnDidChangeFocusedClient.

Bug: 936316
Change-Id: Ib7de74178590cec0acd87dbb58563eb1b55a4fbd
Reviewed-on: https://chromium-review.googlesource.com/c/1491159
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Auto-Submit: Yuichiro Hanada <yhanada@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636028}
1 file changed