Revert of DevTools: Implement Styles search and Computed style filter (https://codereview.chromium.org/129793013/)

Reason for revert:
Broke the Styles pane

Original issue's description:
> DevTools: Implement Styles search and Computed style filter
> 
> The user can search styles by property name, value, or rule selector.
> Computed style properties are filtered, so that only matching ones are visible.
> 
> R=eustas, pfeldman, vsevik
> BUG=278852
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=169860

TBR=eustas@chromium.org,pfeldman@chromium.org,vsevik@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=278852

Review URL: https://codereview.chromium.org/208503006

git-svn-id: svn://svn.chromium.org/blink/trunk@169931 bbb929c8-8fbe-4397-9dbb-9b2b20218538