Revert 270290 "Reduce creation of ViewsDelegate"

Revert 270290 "Reduce creation of ViewsDelegate"

Speculatively reverting as it may have caused the tree to break: http://build.chromium.org/p/chromium.win/builders/Win%20Builder/builds/20345/steps/compile/logs/stdio

> Reduce creation of ViewsDelegate
> 
> By consolidating override of OnBeforeWidgetInit that finds shell many
> of the places that were setting a viewsdelegate no longer need to.
> 
> Also, made AshTestHelper install a ViewsDelegate so that tests don't have.
> 
> Because of removed an include of views_delegate from ash_test_helper I had to update some includes.
> 
> BUG=none
> TEST=none
> R=ben@chromium.org
> 
> Review URL: https://codereview.chromium.org/280863002

TBR=sky@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=270305

[raymes, 2014-05-14 02:44:05]

Committed patchset #1 manually as r270305 (tree was closed).