DevTools: Draw timeline counter markers using HTML

R=yurys@chromium.org

Review URL: https://codereview.chromium.org/153833002

git-svn-id: svn://svn.chromium.org/blink/trunk@166397 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Auto-rebaseline for r166369

http://src.chromium.org/viewvc/blink?view=revision&revision=166369

BUG=332311
TBR=caseq@chromium.org

Review URL: https://codereview.chromium.org/153843002

git-svn-id: svn://svn.chromium.org/blink/trunk@166398 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Auto-rebaseline for r166371

http://src.chromium.org/viewvc/blink?view=revision&revision=166371

BUG=338674
TBR=leviw@chromium.org

Review URL: https://codereview.chromium.org/129863007

git-svn-id: svn://svn.chromium.org/blink/trunk@166399 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add use counters for EventSource.URL, WebSocket.URL.

These two properties (in their uppercased form) are an accident of
spec history. Add use counters to gauge if the process of retirement
can be started.

R=jochen@chromium.org
BUG=249727

Review URL: https://codereview.chromium.org/149773004

git-svn-id: svn://svn.chromium.org/blink/trunk@166400 bbb929c8-8fbe-4397-9dbb-9b2b20218538