Revert of Make pause-on-exceptions toggle/tri-state button. (https://codereview.chromium.org/102003006/)

Reason for revert:
Temporarily revert to avoid user confusion.

Original issue's description:
> Make pause-on-exceptions toggle/tri-state button.
> 
> BUG=
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=165051

TBR=vsevik@chromium.org,aandrey@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/145583007

git-svn-id: svn://svn.chromium.org/blink/trunk@165867 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Fix the usage counting of CaptureAttributeAsEnum.

We were counting usage of this deprecated feature even when it was not used
in a deprecated form (ie. when the "capture" attribute of the <input>
element was not used as an enum). We now measure usage of both
CaptureAttributeAsEnum and the newly-added CaptureAttributeAsBoolean, so
that we know when usage of the deprecated form has dropped low enough
compared to the recommended one.

Additionally, correctly detect whether the capture attribute is being used
in a deprecated way: using !fastGetAttribute().isNull() at that point would
always return true -- we want isEmpty() instead.

R=jochen@chromium.org,tkent@chromium.org

Review URL: https://codereview.chromium.org/137233012

git-svn-id: svn://svn.chromium.org/blink/trunk@165868 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[SVG] Deflake repeatn-event-1b.svg and repeatn-event-1d.svg

svg/animations/repeatn-event-1b.svg and svg/animations/repeatn-event-1d.svg
are currently flaky on our trybots particularly the debug and asan bots.
This patch increases reliability by bumping the timeout from 10ms to 30ms.

R=pdr@chromium.org, schenney@chromium.org, dschulze@chromium.org, fmalita@chromium.org, rob.buis@samsung.com
BUG=333791

Review URL: https://codereview.chromium.org/148383002

git-svn-id: svn://svn.chromium.org/blink/trunk@165869 bbb929c8-8fbe-4397-9dbb-9b2b20218538