Revert of Fix and re-enable some browser focus interactive ui tests.

Revert of Fix and re-enable some browser focus interactive ui tests. (https://codereview.chromium.org/296523002/)

Reason for revert:
Tests failing on WinXP waterfall bot:

2 tests timed out:
    BrowserFocusTest.FocusTraversal
    BrowserFocusTest.FocusTraversalOnInterstitial

Starting

http://build.chromium.org/p/chromium.win/builders/XP%20Tests%20%281%29/builds/31296

Original issue's description:
> Fix and re-enable some browser focus interactive ui tests.
> 
> Fix FocusTraversal[OnInterstitial] except *OnInterstitial on Mac :(
> Fix InterstitialFocus and FindFocusTest.
> 
> Add a TestFocusTraversal helper function consolidated from tests.
> Simplify TestInterstitialPage and add a WaitForInterstitial helper.
> Move test server init to a common SetUpOnMainThread.
> Remove unnecessary helpers and includes.
> 
> TODO(followup): Fix more tests!
> TODO(followup): s/DisableFindBarAnimationsDuringTesting/ScopedAnimationDurationScaleMode/?
> 
> BUG=60973, 62544, 67301, 81451, 109770, 163931
> TEST=Automated tests work and stay enabled...
> R=sky@chromium.org
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=272259

TBR=sky@chromium.org,msw@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=60973, 62544, 67301, 81451, 109770, 163931
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=272410

[tapted, 2014-05-23 06:12:13]

Created Revert of Fix and re-enable some browser focus interactive ui tests.

[commit-bot: I haz the power, 2014-05-23 06:14:01]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tapted@chromium.org/299703018/1

[commit-bot: I haz the power, 2014-05-23 06:16:19]

Change committed as 272410

[msw, 2014-05-23 16:30:46]

lgtm; darn XP!