[DevTools] Focus sidebar trees in certain panels by default.

third_party/WebKit/Source/devtools/front_end/resources/ResourcesPanel.js

Index: third_party/WebKit/Source/devtools/front_end/resources/ResourcesPanel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/resources/ResourcesPanel.js b/third_party/WebKit/Source/devtools/front_end/resources/ResourcesPanel.js
index 4e8ae9a2eb4eb3970e0b0fe0b1f5b34428cf7595..9dd1a0383fb7e8e01494fca6276ac2b223f4c8e7 100644
--- a/third_party/WebKit/Source/devtools/front_end/resources/ResourcesPanel.js
+++ b/third_party/WebKit/Source/devtools/front_end/resources/ResourcesPanel.js
@@ -45,7 +45,6 @@ WebInspector.ResourcesPanel = function()
     this._sidebarTree.registerRequiredCSS("resources/resourcesSidebar.css");
     this._sidebarTree.element.classList.add("filter-all");
     this.panelSidebarElement().appendChild(this._sidebarTree.element);
-    this.setDefaultFocusedElement(this._sidebarTree.element);
 
     this._applicationTreeElement = this._addSidebarSection(WebInspector.UIString("Application"));
     this._manifestTreeElement = new WebInspector.AppManifestTreeElement(this);
@@ -162,6 +161,14 @@ WebInspector.ResourcesPanel.prototype = {
         this._resetWithFrames();
     },
 
+    /**
+     * @override
+     */
+    focus: function()
+    {
+        this._sidebarTree.focus();
+    },
+
     _initialize: function()
     {
         this._databaseModel.enable();