Address flaky test by waiting for focus change.

Address flaky test by waiting for focus change.

This change attempts to fix a flaky test by changing the KeyPress function to
use SendKeyPressAndWait which will wait for an event. The event that this test
will wait for is the focus change event that should get called when an element
in the web form changes focus.

BUG=405711
Committed: https://crrev.com/b1828abc27926f8f92564ebf21072e98b786fa2a
Cr-Commit-Position: refs/heads/master@{#292220}

[hcarmona, 2014-08-25 22:45:02]

hcarmona@chromium.org changed reviewers:
+ msw@chromium.org

[hcarmona, 2014-08-25 22:53:15]

Hi Mike,

I wanted to add you as a code reviewer since you're familiar with the way it's
supposed to work. My change is for the test to wait for the focus change in the
web content.

-Hector

[msw, 2014-08-27 19:01:33]

Nice, lgtm with a nit.

https://codereview.chromium.org/503863002/diff/1/chrome/browser/ui/webui/opti...
File chrome/browser/ui/webui/options/language_options_interactive_uitest.cc
(right):

https://codereview.chromium.org/503863002/diff/1/chrome/browser/ui/webui/opti...
chrome/browser/ui/webui/options/language_options_interactive_uitest.cc:64:
content::RenderViewHost* GetRenderViewHost() {
nit: this helper seem unnecessary for one call.

[hcarmona, 2014-08-27 20:15:22]

The CQ bit was checked by hcarmona@chromium.org

[commit-bot: I haz the power, 2014-08-27 20:16:42]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/hcarmona@chromium.org/503863002/1

[commit-bot: I haz the power, 2014-08-27 21:11:27]

Committed patchset #1 (id:1) as d6108896d719f17c3b7a95e9c734696b8676f52f

[commit-bot: I haz the power, 2014-09-10 02:53:56]

Patchset 1 (id:??) landed as
https://crrev.com/b1828abc27926f8f92564ebf21072e98b786fa2a
Cr-Commit-Position: refs/heads/master@{#292220}