Wait for SHOW_PRESS gesture to avoid flake in root_window_unittest.cc

Wait for SHOW_PRESS gesture to avoid flake in root_window_unittest.cc

Previously in RootWindowTest.TouchMovesHeld, sometimes a SHOW_PRESS
gesture would be fired, and sometimes it wouldn't, depending on
whether or not the 5ms timer used in tests for the SHOW_PRESS
gesture was fired. Now we explicitly wait for the gesture to be
fired before continuing.

Marked flaky here: https://codereview.chromium.org/136013002/

TEST=RootWindowTest.TouchMovesHeld
BUG=333644
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=245087

[tdresser, 2014-01-14 16:29:50]

PTAL.

[Nico, 2014-01-14 19:22:05]

s:me:ui/aura/OWNER:

[sadrul, 2014-01-15 19:08:59]

https://codereview.chromium.org/136843003/diff/100001/ui/aura/root_window_uni...
File ui/aura/root_window_unittest.cc (right):

https://codereview.chromium.org/136843003/diff/100001/ui/aura/root_window_uni...
ui/aura/root_window_unittest.cc:443: void WaitUntilReceivedGesture(ui::EventType
type) {
Call this WaitUntilReceivedEvent

https://codereview.chromium.org/136843003/diff/100001/ui/aura/root_window_uni...
ui/aura/root_window_unittest.cc:479: wait_until_event_ = ui::ET_UNKNOWN;
Do this in OnEvent

[tdresser, 2014-01-15 19:30:40]

https://codereview.chromium.org/136843003/diff/100001/ui/aura/root_window_uni...
File ui/aura/root_window_unittest.cc (right):

https://codereview.chromium.org/136843003/diff/100001/ui/aura/root_window_uni...
ui/aura/root_window_unittest.cc:443: void WaitUntilReceivedGesture(ui::EventType
type) {
On 2014/01/15 19:08:59, sadrul wrote:
> Call this WaitUntilReceivedEvent

Done.

https://codereview.chromium.org/136843003/diff/100001/ui/aura/root_window_uni...
ui/aura/root_window_unittest.cc:479: wait_until_event_ = ui::ET_UNKNOWN;
On 2014/01/15 19:08:59, sadrul wrote:
> Do this in OnEvent

Done.

[sadrul, 2014-01-15 19:34:34]

Thanks. LGTM

[commit-bot: I haz the power, 2014-01-15 21:29:09]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tdresser@chromium.org/136843003/220001

[commit-bot: I haz the power, 2014-01-16 03:14:13]

Change committed as 245087