Web Inspector: Remove Timeline MarkDOMContent and MarkLoad, data is already available

Web Inspector: Remove Timeline MarkDOMContent and MarkLoad, data is already available
https://bugs.webkit.org/show_bug.cgi?id=150615

Patch by Joseph Pecoraro <pecoraro@apple.com> on 2015-10-27
Reviewed by Timothy Hatcher.

Source/JavaScriptCore:

* inspector/protocol/Timeline.json:

Source/WebCore:

The timestamp only event data is already available from `Page.domContentEventFired`
and `Page.loadEventFired` events. We can drop the Timeline specific events in
favor of these which have existed for a very long time (before iOS 7).

* inspector/InspectorInstrumentation.cpp:
(WebCore::InspectorInstrumentation::loadEventFiredImpl):
(WebCore::InspectorInstrumentation::domContentLoadedEventFiredImpl): Deleted.
* inspector/InspectorTimelineAgent.cpp:
(WebCore::InspectorTimelineAgent::didMarkDOMContentEvent): Deleted.
(WebCore::InspectorTimelineAgent::didMarkLoadEvent): Deleted.
(WebCore::toProtocol): Deleted.
* inspector/InspectorTimelineAgent.h:
* inspector/TimelineRecordFactory.cpp:
(WebCore::TimelineRecordFactory::createMarkData): Deleted.
* inspector/TimelineRecordFactory.h:

Source/WebInspectorUI:

* UserInterface/Controllers/TimelineManager.js:
(WebInspector.TimelineManager.prototype._processEvent):
Remove the now unneed mark event handling.

(WebInspector.TimelineManager.prototype.pageDOMContentLoadedEventFired):
(WebInspector.TimelineManager.prototype.pageLoadEventFired):
Update the main frame and create markers for the current recording.

* UserInterface/Protocol/PageObserver.js:
(WebInspector.PageObserver.prototype.domContentEventFired):
(WebInspector.PageObserver.prototype.loadEventFired):
Forward to TimelineManager.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@191651 268f45cc-cd09-0410-ab3c-d52691b4dbfc