Web Inspector: use timestamps consistent with rest of Timeline in WebSocket events.
https://bugs.webkit.org/show_bug.cgi?id=111344

- create web socket related records in a manner consistent with the rest of timeline.

Reviewed by Pavel Feldman.

* inspector/InspectorTimelineAgent.cpp:
(WebCore::InspectorTimelineAgent::didCreateWebSocket):
(WebCore::InspectorTimelineAgent::willSendWebSocketHandshakeRequest):
(WebCore::InspectorTimelineAgent::didReceiveWebSocketHandshakeResponse):
(WebCore::InspectorTimelineAgent::didDestroyWebSocket):
* inspector/InspectorTimelineAgent.h:
(InspectorTimelineAgent):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144746 268f45cc-cd09-0410-ab3c-d52691b4dbfc