DevTools: Introduce Landing page for Timeline panel.

third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 805 matching lines @@
       this._rightToolbar = new UI.Toolbar('tabbed-pane-right-toolbar');
       this._headerElement.appendChild(this._rightToolbar.element);
     }
     return this._rightToolbar;
   }
 
   renderWithNoHeaderBackground() {
     this._headerElement.classList.add('tabbed-pane-no-header-background');
   }
 
+  renderWithNoTabBorders() {

[pfeldman, 2016/12/10 02:15:59]

Same as slider?

+    this._headerElement.classList.add('tabbed-pane-no-tab-borders');
+  }
+
   /**
    * @param {boolean} allow
    * @param {boolean=} automatic
    */
   setAllowTabReorder(allow, automatic) {
     this._allowTabReorder = allow;
     this._automaticReorder = automatic;
   }
 };
 
@@ skipping 373 matching lines @@
    * @param {!Array.<string>} ids
    */
   closeTabs(tabbedPane, ids) {},
 
   /**
    * @param {string} tabId
    * @param {!UI.ContextMenu} contextMenu
    */
   onContextMenu(tabId, contextMenu) {}
 };