Revert "DevTools: allow showing views above and below the Sources sidebar."

This reverts commit d21d2ed3.

Reason for revert: Causing devtools_eslint failure
https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8928389307771200912/+/steps/devtools_eslint/0/stdout

Original change's description:
> DevTools: allow showing views above and below the Sources sidebar.
> 
> Change-Id: I76a8edbc45bd6e2d775b48c8f93e288d82bed817
> Reviewed-on: https://chromium-review.googlesource.com/c/1357513
> Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
> Commit-Queue: Pavel Feldman <pfeldman@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#612830}

TBR=dgozman@chromium.org,pfeldman@chromium.org,kozy@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I58fd8fab81766fee2aca0747a78f4ac61647f7cf
Reviewed-on: https://chromium-review.googlesource.com/c/1358118Reviewed-by: calamity <calamity@chromium.org>
Commit-Queue: calamity <calamity@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613013}

third_party/blink/renderer/devtools/front_end/browser_debugger/module.json

@@ -2,7 +2,7 @@
     "extensions": [
         {
             "type": "view",
-            "location": "sources.sidebar-bottom",
+            "location": "sources-sidebar",
             "id": "sources.eventListenerBreakpoints",
             "title": "Event Listener Breakpoints",
             "order": 9,
@@ -18,7 +18,7 @@
         },
         {
             "type": "view",
-            "location": "sources.sidebar-bottom",
+            "location": "sources-sidebar",
             "id": "sources.xhrBreakpoints",
             "title": "XHR/fetch Breakpoints",
             "order": 5,
@@ -28,7 +28,7 @@
         },
         {
             "type": "view",
-            "location": "sources.sidebar-bottom",
+            "location": "sources-sidebar",
             "id": "sources.domBreakpoints",
             "title": "DOM Breakpoints",
             "order": 7,
@@ -67,7 +67,7 @@
         },
         {
             "type": "view",
-            "location": "sources.sidebar-bottom",
+            "location": "sources-sidebar",
             "id": "sources.globalListeners",
             "title": "Global Listeners",
             "order": 8,

third_party/blink/renderer/devtools/front_end/sources/SourcesPanel.js

@@ -251,13 +251,11 @@ Sources.SourcesPanel = class extends UI.Panel {
    * @return {?UI.ViewLocation}
    */
   resolveLocation(locationName) {
-    if (locationName === 'sources.sidebar-top' || locationName === 'sources.sidebar-bottom' ||
-        locationName === 'sources.sidebar-tabs') {
+    if (locationName === 'sources-sidebar')
       return this._sidebarPaneStack;
-    } else {
+    else
       return this._navigatorTabbedLocation;
   }
-  }
 
   /**
    * @return {boolean}
@@ -901,7 +899,6 @@ Sources.SourcesPanel = class extends UI.Panel {
     this._sidebarPaneStack.widget().element.classList.add('overflow-auto');
     this._sidebarPaneStack.widget().show(vbox.element);
     this._sidebarPaneStack.widget().element.appendChild(this._debuggerPausedMessage.element());
-    this._sidebarPaneStack.appendApplicableItems('sources.sidebar-top');
     vbox.element.appendChild(this._debugToolbar.element);
 
     if (this._threadsSidebarPane)
@@ -940,12 +937,11 @@ Sources.SourcesPanel = class extends UI.Panel {
       this._splitWidget.installResizer(this._debugToolbar.gripElementForResize());
       tabbedLocation.appendView(scopeChainView);
       tabbedLocation.appendView(this._watchSidebarPane);
-      tabbedLocation.appendApplicableItems('sources.sidebar-tabs');
       this._extensionSidebarPanesContainer = tabbedLocation;
       this.sidebarPaneView = splitWidget;
     }
 
-    this._sidebarPaneStack.appendApplicableItems('sources.sidebar-bottom');
+    this._sidebarPaneStack.appendApplicableItems('sources-sidebar');
     const extensionSidebarPanes = Extensions.extensionServer.sidebarPanes();
     for (let i = 0; i < extensionSidebarPanes.length; ++i)
       this._addExtensionSidebarPane(extensionSidebarPanes[i]);

third_party/blink/renderer/devtools/front_end/sources/module.json

@@ -715,24 +715,11 @@
         {
             "type": "@UI.ViewLocationResolver",
             "name": "navigator-view",
-            "category": "Sources",
-            "className": "Sources.SourcesPanel"
-        },
-        {
-            "type": "@UI.ViewLocationResolver",
-            "name": "sources.sidebar-top",
-            "category": "Sources",
-            "className": "Sources.SourcesPanel"
-        },
-        {
-            "type": "@UI.ViewLocationResolver",
-            "name": "sources.sidebar-bottom",
-            "category": "Sources",
             "className": "Sources.SourcesPanel"
         },
         {
             "type": "@UI.ViewLocationResolver",
-            "name": "sources.sidebar-tabs",
+            "name": "sources-sidebar",
             "category": "Sources",
             "className": "Sources.SourcesPanel"
         },