Web Inspector: move OverviewGrid and OverviewWindow into separate file.
https://bugs.webkit.org/show_bug.cgi?id=112693

Reviewed by Yury Semikhatsky.

It is the third patch for the meta bug "Web Inspector: meta bug: extract OverviewGrid from TimelineOverviewPane"
It just moves the OverviewGrid and the related classes into its own file.

* WebCore.gypi:
* WebCore.vcproj/WebCore.vcproj:
* WebCore.vcxproj/WebCore.vcxproj:
* WebCore.vcxproj/WebCore.vcxproj.filters:
* inspector/compile-front-end.py:
* inspector/front-end/OverviewGrid.js: Added.
(WebInspector.OverviewGrid):
(WebInspector.OverviewGrid.prototype.itemsGraphsElement):
(WebInspector.OverviewGrid.prototype.insertBeforeItemsGraphsElement):
(WebInspector.OverviewGrid.prototype.clientWidth):
(WebInspector.OverviewGrid.prototype.showItemsGraphsElement):
(WebInspector.OverviewGrid.prototype.hideItemsGraphsElement):
(WebInspector.OverviewGrid.prototype.updateDividers):
(WebInspector.OverviewGrid.prototype.addEventDividers):
(WebInspector.OverviewGrid.prototype.removeEventDividers):
(WebInspector.OverviewGrid.prototype.setWindowPosition):
(WebInspector.OverviewGrid.prototype.reset):
(WebInspector.OverviewGrid.prototype.windowLeft):
(WebInspector.OverviewGrid.prototype.windowRight):
(WebInspector.OverviewGrid.prototype.setWindow):
(WebInspector.OverviewGrid.prototype.addEventListener):
(WebInspector.OverviewGrid.Window):
(WebInspector.OverviewGrid.Window.prototype.reset):
(WebInspector.OverviewGrid.Window.prototype._leftResizeElementDragging):
(WebInspector.OverviewGrid.Window.prototype._rightResizeElementDragging):
(WebInspector.OverviewGrid.Window.prototype._startWindowSelectorDragging):
(WebInspector.OverviewGrid.Window.prototype._windowSelectorDragging):
(WebInspector.OverviewGrid.Window.prototype._endWindowSelectorDragging):
(WebInspector.OverviewGrid.Window.prototype._startWindowDragging):
(WebInspector.OverviewGrid.Window.prototype._windowDragging):
(WebInspector.OverviewGrid.Window.prototype._endWindowDragging):
(WebInspector.OverviewGrid.Window.prototype._moveWindow):
(WebInspector.OverviewGrid.Window.prototype._resizeWindowLeft):
(WebInspector.OverviewGrid.Window.prototype._resizeWindowRight):
(WebInspector.OverviewGrid.Window.prototype._resizeWindowMaximum):
(WebInspector.OverviewGrid.Window.prototype._setWindow):
(WebInspector.OverviewGrid.Window.prototype._setWindowPosition):
(WebInspector.OverviewGrid.Window.prototype._onMouseWheel):
(WebInspector.OverviewGrid.Window.prototype._zoom):
(WebInspector.OverviewGrid.WindowSelector):
(WebInspector.OverviewGrid.WindowSelector.prototype._createSelectorElement):
(WebInspector.OverviewGrid.WindowSelector.prototype._close):
(WebInspector.OverviewGrid.WindowSelector.prototype._updatePosition):
* inspector/front-end/TimelineOverviewPane.js:
* inspector/front-end/WebKit.qrc:
* inspector/front-end/inspector.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146204 268f45cc-cd09-0410-ab3c-d52691b4dbfc