2017-05-23  Devin Rousso  <drousso@apple.com>

        Web Inspector: use initialLayout for NetworkSidebarPanel

        https://bugs.webkit.org/show_bug.cgi?id=172470

        Reviewed by Joseph Pecoraro.

        * UserInterface/Views/NetworkSidebarPanel.js:

        (WebInspector.NetworkSidebarPanel):

        (WebInspector.NetworkSidebarPanel.prototype.showDefaultContentView):

        (WebInspector.NetworkSidebarPanel.prototype.initialLayout):

        Don't create NetworkGridContentView until right before it is shown.

        if (!this._networkGridView)

            this._networkGridView = new WebInspector.NetworkGridContentView(null, {networkSidebarPanel: this});

    initialLayout()

    {

        this._navigationBar = new WebInspector.NavigationBar;

        this.addSubview(this._navigationBar);

        this._resourcesTitleBarElement = document.createElement("div");

        this._resourcesTitleBarElement.textContent = WebInspector.UIString("Name");

        this._resourcesTitleBarElement.classList.add("title-bar");

        this.element.appendChild(this._resourcesTitleBarElement);

        let scopeItemPrefix = "network-sidebar-";

        let scopeBarItems = [];

        scopeBarItems.push(new WebInspector.ScopeBarItem(scopeItemPrefix + "type-all", WebInspector.UIString("All Resources"), true));

        for (let key in WebInspector.Resource.Type) {

            let value = WebInspector.Resource.Type[key];

            let scopeBarItem = new WebInspector.ScopeBarItem(scopeItemPrefix + value, WebInspector.Resource.displayNameForType(value, true));

            scopeBarItem[WebInspector.NetworkSidebarPanel.ResourceTypeSymbol] = value;

            scopeBarItems.push(scopeBarItem);

        }

        this._scopeBar = new WebInspector.ScopeBar("network-sidebar-scope-bar", scopeBarItems, scopeBarItems[0], true);

        this._scopeBar.addEventListener(WebInspector.ScopeBar.Event.SelectionChanged, this._scopeBarSelectionDidChange, this);

        this._navigationBar.addNavigationItem(this._scopeBar);

        WebInspector.timelineManager.persistentNetworkTimeline.addEventListener(WebInspector.Timeline.Event.Reset, this._networkTimelineReset, this);

        this.contentBrowser.addEventListener(WebInspector.ContentBrowser.Event.CurrentContentViewDidChange, this._contentBrowserCurrentContentViewDidChange, this);

        this._contentBrowserCurrentContentViewDidChange();

    }