DevTools: follow up to r183187, restore custom settings

TBR=apavlov

Review URL: https://codereview.chromium.org/631533002

git-svn-id: svn://svn.chromium.org/blink/trunk@183232 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Use bit-fields for space saving in PointerEventsHitRules

Use bit-fields for space saving in PointerEventsHitRules. This makes
the class size shrink to the size of an unsigned.

Review URL: https://codereview.chromium.org/612823004

git-svn-id: svn://svn.chromium.org/blink/trunk@183233 bbb929c8-8fbe-4397-9dbb-9b2b20218538