Use TrackExceptionState instead of NonThrowExceptionState

I somehow ended up with two classes doing the same thing. This removes
NonThrowExceptionState in favor of TrackExceptionState.

BUG=252233
TBR=abarth

Review URL: https://chromiumcodereview.appspot.com/22280003

git-svn-id: svn://svn.chromium.org/blink/trunk@155557 bbb929c8-8fbe-4397-9dbb-9b2b20218538