Refresh output cache when setting display mode

Refresh output cache when setting display mode

Historically, all the entry-points into the OutputConfigurator needed to refresh
their view of the cached output data.  This newly-added entry-point doesn't do
this which can lead to the cached data becoming stale (since it technically only
applies within the context where the corresponding XRRScreenResources are
valid).
Ideally, no such information would be cached and every attempt to evaluate or
change the state of the video outputs would start by requesting this structure.
That change is of larger scope and risk, though, so this is the tactical
solution to the immediate problem suitable for porting to stable branches.

BUG=chromium:140807
TEST=Manually tested that ctrl-F4 and "manage displays" (in chrome://settings)
work on a Lumpy the same way with and without this change


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=151696

[Simon Que, 2012-08-14 18:30:45]

LGTM

[disher, 2012-08-14 18:33:59]

satorux@ for owners

[satorux1, 2012-08-14 18:42:45]

I'm not qualified to review the code, however, If you add
chromeos/display/OWNERS file in a separate patch, I can LGTM it, so you can
submit this patch.

[commit-bot: I haz the power, 2012-08-15 13:17:23]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/disher@chromium.org/10825306/7001

[commit-bot: I haz the power, 2012-08-15 15:41:47]

Change committed as 151696