[Password manager tests automation] Fix "No such frame" error.

[Password manager tests automation] Fix "No such frame" error.

In some cases selenium are unable to select frame, which give an
exception and prevents test running. Fix this by explicitly navigating
to desired frame.

BUG=369521
R=vabr@chromium.org

Committed: https://crrev.com/a57762c31ca0760329bbe006115fa5ef3a639e68
Cr-Commit-Position: refs/heads/master@{#330491}

[melandory, 2015-05-18 14:09:04]

Hi Vaclav,

review this CL, please.

Unfortunately, I was unable to discover why switch_to_frame fails.

[vabr (Chromium), 2015-05-18 15:34:03]

LGTM!

I suspect this might be the issue of the settings page loading too slowly.

But loading the frame directly sounds like a good idea.

Thanks!
Vaclav

[melandory, 2015-05-19 07:52:13]

The CQ bit was checked by melandory@chromium.org

[commit-bot: I haz the power, 2015-05-19 07:52:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1147483003/1

[commit-bot: I haz the power, 2015-05-19 07:55:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-19 07:56:58]

Patchset 1 (id:??) landed as
https://crrev.com/a57762c31ca0760329bbe006115fa5ef3a639e68
Cr-Commit-Position: refs/heads/master@{#330491}