https://bugs.webkit.org/show_bug.cgi?id=113196

Reviewed by Pavel Feldman.

Source/WebCore:

- keep event divider records in TimelinePresentationModel, not in TimelinePanel;
- process event divider records on every level, not just on top.

* inspector/front-end/TimelinePanel.js:
(WebInspector.TimelinePanel.prototype._updateEventDividers):
(WebInspector.TimelinePanel.prototype._innerAddRecordToTimeline.checkVisible):
(WebInspector.TimelinePanel.prototype._resetPanel):
* inspector/front-end/TimelinePresentationModel.js:
(WebInspector.TimelinePresentationModel.prototype.reset):
(WebInspector.TimelinePresentationModel.prototype._innerAddRecord):
(WebInspector.TimelinePresentationModel.prototype.eventDividerRecords):

LayoutTests:

- use TimelinePresentationModel to fetch list of event divider records;

* http/tests/inspector/timeline-test.js:
(initialize_Timeline.InspectorTest.printTimestampRecords):
* inspector/timeline/timeline-load-event-expected.txt:
* inspector/timeline/timeline-load-event.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147097 268f45cc-cd09-0410-ab3c-d52691b4dbfc