athena: Make sure the window captions update correctly for theme-color.

athena: Make sure the window captions update correctly for theme-color.

Make sure the Activity is updated when the theme-color changes. Also, update the
background color from UpdateWindowIcon() override, instead of from UpdateWindowTitle(),
since the latter doesn't get called if the title didn't actually change, and so
just changing the color doesn't actually update the view.

BUG=none
R=oshima@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/e5d4ccbd978334a428653cace202f5cc963fffb6

[sadrul, 2014-09-05 20:50:48]

sadrul@chromium.org changed reviewers:
+ oshima@chromium.org

[oshima, 2014-09-05 21:22:16]

lgtm

[sadrul, 2014-09-06 01:22:40]

Committed patchset #1 (id:1) manually as e5d4ccb (presubmit successful).

[commit-bot: I haz the power, 2014-09-10 03:42:08]

Patchset 1 (id:??) landed as
https://crrev.com/e5d4ccbd978334a428653cace202f5cc963fffb6
Cr-Commit-Position: refs/heads/master@{#293600}