Web Inspector: display time intervals measured with console.time() and console.timeEn...

Web Inspector: display time intervals measured with console.time() and console.timeEnd() in Timeline
https://bugs.webkit.org/show_bug.cgi?id=90442

Reviewed by Pavel Feldman.

Source/WebCore:

- added Time and TimeEnd record types produced by console.time() and console.timeEnd()
- connect Time to TimeEnd in "glue" mode to better visualize the interval;
- always make Time a top-level record;

* English.lproj/localizedStrings.js:
* inspector/InspectorInstrumentation.cpp:
(WebCore::InspectorInstrumentation::startConsoleTimingImpl):
(WebCore::InspectorInstrumentation::stopConsoleTimingImpl):
* inspector/InspectorTimelineAgent.cpp:
(TimelineRecordType):
(WebCore::InspectorTimelineAgent::didStartTiming):
(WebCore):
(WebCore::InspectorTimelineAgent::didStopTiming):
* inspector/InspectorTimelineAgent.h:
(InspectorTimelineAgent):
* inspector/front-end/TimelineModel.js:
* inspector/front-end/TimelinePresentationModel.js:
(WebInspector.TimelinePresentationModel.recordStyle):
(WebInspector.TimelinePresentationModel.categoryForRecord):
(WebInspector.TimelinePresentationModel.prototype.reset):
(WebInspector.TimelinePresentationModel.prototype.addRecord):
(WebInspector.TimelinePresentationModel.prototype._findParentRecord):
(WebInspector.TimelinePresentationModel.Record):
(WebInspector.TimelinePresentationModel.Record.prototype.generatePopupContent):

LayoutTests:

- added Time & TimeEnd;

* inspector/timeline/timeline-enum-stability-expected.txt:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121763 268f45cc-cd09-0410-ab3c-d52691b4dbfc