DevTools: Remove style sheet list from activeStyleSheetsUpdated instrumentation and allow inspector to request active style sheets when it needs them.

This will allow us to query all the active style sheets at the inspector start time and to avoid collecting all active style sheets when inspector does not really need them.

Review URL: https://codereview.chromium.org/116083005

git-svn-id: svn://svn.chromium.org/blink/trunk@164339 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: [JsDocValidator] Implement inheritance consistency check

The check verifies that type JSDoc and __proto__ assignment are consistent.

R=eustas, loislo, vsevik, sergeyv

Review URL: https://codereview.chromium.org/110223010

git-svn-id: svn://svn.chromium.org/blink/trunk@164340 bbb929c8-8fbe-4397-9dbb-9b2b20218538