Reviewed by Timothy Hatcher.

        Web Inspector: Popup for Timeline panel will work in a tooltip mode

        https://bugs.webkit.org/show_bug.cgi?id=35680

        * inspector/front-end/Popover.js:
        (WebInspector.Popover):
        (WebInspector.Popover.prototype.show):
        (WebInspector.Popover.prototype.hide):
        (WebInspector.Popover.prototype._positionElement):
        (WebInspector.PopoverHelper):
        (WebInspector.PopoverHelper.prototype._mouseDown):
        (WebInspector.PopoverHelper.prototype._mouseMove.doHide):
        (WebInspector.PopoverHelper.prototype._mouseMove):
        (WebInspector.PopoverHelper.prototype._resetHoverTimer):
        (WebInspector.PopoverHelper.prototype.hidePopup):
        (WebInspector.PopoverHelper.prototype._mouseHover):
        (WebInspector.PopoverHelper.prototype._killHidePopupTimer):
        * inspector/front-end/TimelineOverviewPane.js:
        (WebInspector.TimelineOverviewPane.prototype.reset):
        * inspector/front-end/TimelinePanel.js:
        (WebInspector.TimelinePanel):
        (WebInspector.TimelinePanel.prototype.get _recordStyles):
        (WebInspector.TimelinePanel.prototype._innerAddRecordToTimeline):
        (WebInspector.TimelinePanel.prototype._scheduleRefresh):
        (WebInspector.TimelinePanel.prototype._refreshRecords):
        (WebInspector.TimelinePanel.prototype._adjustScrollPosition):
        (WebInspector.TimelinePanel.prototype._getPopoverAnchor):
        (WebInspector.TimelinePanel.prototype._showPopover):
        (WebInspector.TimelinePanel.prototype._closeRecordDetails):
        (WebInspector.TimelineRecordListRow):
        (WebInspector.TimelineRecordListRow.prototype.update):
        (WebInspector.TimelineRecordGraphRow):
        (WebInspector.TimelineRecordGraphRow.prototype._onClick):
        (WebInspector.TimelinePanel.FormattedRecord):
        (WebInspector.TimelinePanel.FormattedRecord.prototype._createCell):
        (WebInspector.TimelinePanel.FormattedRecord.prototype._createRow):
        (WebInspector.TimelinePanel.FormattedRecord.prototype._createLinkRow):
        (WebInspector.TimelinePanel.FormattedRecord.prototype._generatePopupContent):
        (WebInspector.TimelinePanel.FormattedRecord.prototype._getRecordDetails):
        * inspector/front-end/inspector.css:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@55530 268f45cc-cd09-0410-ab3c-d52691b4dbfc