Revert 178911 "Revert 178848 "[DevTools] Make toolbar counters d..."

Broken test is incorrect and was disabled.

> Revert 178848 "[DevTools] Make toolbar counters declarative."
>
> This CL or r178850 broke the following browser tests.
> http://build.chromium.org/p/chromium.webkit/builders/Linux%20Tests%20%28dbg%29/builds/3288
>
> Let me revert the two CLs at the moment.
>
>
> > [DevTools] Make toolbar counters declarative.
> >
> > This includes error-warning and devices counters.
> >
> > BUG=none
> >
> > Review URL: https://codereview.chromium.org/408853002
>
> TBR=dgozman@chromium.org
>
> Review URL: https://codereview.chromium.org/416983006

R=haraken@chromium.org
TBR=haraken@chromium.org

Review URL: https://codereview.chromium.org/418343002

git-svn-id: svn://svn.chromium.org/blink/trunk@178930 bbb929c8-8fbe-4397-9dbb-9b2b20218538