DevTools: fix focus behavior

This patch fixes two focus glitches:
- when a tab is closed via mouse, a newly opened editor (if any) is focused
- when a ctrl-r is hit inside and an editor opened to edit network
resource, the focus is brough back in any re-opened editor.

BUG=360584

Review URL: https://codereview.chromium.org/230163005

git-svn-id: svn://svn.chromium.org/blink/trunk@171154 bbb929c8-8fbe-4397-9dbb-9b2b20218538
WebAudio: Remove legacy support for numerical values for BiquadFilterNode types.

BUG=346522

Review URL: https://codereview.chromium.org/209393010

git-svn-id: svn://svn.chromium.org/blink/trunk@171155 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[CSS Grid Layout] Introduce an explicit type for resolved grid positions

We were using simple size_t integers to represent resolved grid
positions in our internal data structures. This change allows us to
clarify the code, avoid potential off by one mistakes, and move the
resolving code to a central place.

Based in a patch by Xan Lopez <xlopez@igalia.com>
https://codereview.chromium.org/113943003/.

BUG=258258

Review URL: https://codereview.chromium.org/166623002

git-svn-id: svn://svn.chromium.org/blink/trunk@171156 bbb929c8-8fbe-4397-9dbb-9b2b20218538