Revert of Removing WTL from content runner.

Revert of Removing WTL from content runner. (https://codereview.chromium.org/323723002/)

Reason for revert:
Speculative revert for breaking TestAccessibleHWND unit test.
http://build.chromium.org/p/chromium.win/builders/Win%207%20Tests%20x64%20%283%29/builds/14186

Original issue's description:
> Removing WTL from content runner.
> 
> The _Module object is used by ATL COM classes to lock the module, like so
> 
> _pAtlModule->Lock();
> 
> For example when CreateInstance is called:
> 
> BrowserAccessibility* BrowserAccessibility::Create() {
>   CComObject<BrowserAccessibilityWin>* instance;
>   HRESULT hr = CComObject<BrowserAccessibilityWin>::CreateInstance(&instance);
> 
> We need to get rid of WTL so we can get rid of ATL since it
> causes many problems. See bug for details.
> 
> BUG=5027
> TEST=chrome runs. Accessibility works.
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=275987

TBR=jam@chromium.org,cpu@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=5027
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=276046

[alph, 2014-06-10 16:00:53]

Created Revert of Removing WTL from content runner.

[commit-bot: I haz the power, 2014-06-10 16:03:41]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/alph@chromium.org/323003007/1

[commit-bot: I haz the power, 2014-06-10 16:06:22]

Change committed as 276046