Web Inspector: update Timeline.TimelineEvent definition to include DOM counters and native memory stats
https://bugs.webkit.org/show_bug.cgi?id=113376

Reviewed by Vsevolod Vlasov.

Added missing fields to Timeline.TimelineEvent type definition in Inspector.json

* inspector/Inspector.json:
* inspector/InspectorTimelineAgent.cpp:
(WebCore::InspectorTimelineAgent::innerAddRecordToTimeline):
(WebCore::InspectorTimelineAgent::setDOMCounters):
Switched InspectorTimelineAgent to the new typed event builders.
(WebCore::InspectorTimelineAgent::setNativeHeapStatistics):
* inspector/InspectorTimelineAgent.h:
(InspectorTimelineAgent):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146975 268f45cc-cd09-0410-ab3c-d52691b4dbfc