DevTools: add entry points for command menu

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

Index: third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js b/third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js
index e3dff50bbfe3d674745788a93514f9130649fc04..172cc6342f1e809ef77ef41b37e09904eb83c73a 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/TabbedPane.js
@@ -45,7 +45,8 @@ UI.TabbedPane = class extends UI.VBox {
     this._tabsElement.setAttribute('role', 'tablist');
     this._contentElement = this.contentElement.createChild('div', 'tabbed-pane-content');
     this._contentElement.setAttribute('role', 'tabpanel');
-    this._contentElement.createChild('content');
+    var contentTag = this._contentElement.createChild('content');
+    contentTag.createChild('span', 'content child');

[chenwilliam, 2017/02/25 00:56:43]

remove this?

[luoe, 2017/03/09 18:48:28]

Done.

     /** @type {!Array.<!UI.TabbedPaneTab>} */
     this._tabs = [];
     /** @type {!Array.<!UI.TabbedPaneTab>} */
@@ -489,10 +490,10 @@ UI.TabbedPane = class extends UI.VBox {
   }
 
   /**
-   * @param {string} text
+   * @param {!Element} element
    */
-  setPlaceholderText(text) {
-    this._noTabsMessage = text;
+  setPlaceholderElement(element) {
+    this._noTabsMessageElement = element;
   }
 
   _innerUpdateTabElements() {
@@ -501,10 +502,8 @@ UI.TabbedPane = class extends UI.VBox {
 
     if (!this._tabs.length) {
       this._contentElement.classList.add('has-no-tabs');
-      if (this._noTabsMessage && !this._noTabsMessageElement) {
-        this._noTabsMessageElement = this._contentElement.createChild('div', 'tabbed-pane-placeholder fill');
-        this._noTabsMessageElement.textContent = this._noTabsMessage;
-      }
+      if (this._noTabsMessageElement)
+        this.element.appendChild(this._noTabsMessageElement);
     } else {
       this._contentElement.classList.remove('has-no-tabs');
       if (this._noTabsMessageElement) {