DevTools: implement release note behind an experiment

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

Index: third_party/WebKit/Source/devtools/front_end/ui/InspectorView.js
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/InspectorView.js b/third_party/WebKit/Source/devtools/front_end/ui/InspectorView.js
index 09b1242539d5edba39762b2a0be58c5a5852210c..077d6c9a2dbf8f882736e2298b17ca7c9c1c8612 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/InspectorView.js
+++ b/third_party/WebKit/Source/devtools/front_end/ui/InspectorView.js
@@ -227,6 +227,14 @@ UI.InspectorView = class extends UI.VBox {
   }
 
   /**
+   * @param {string} id
+   * @param {boolean=} userGesture
+   */
+  closeDrawerTab(id, userGesture) {
+    this._drawerTabbedPane.closeTab(id, userGesture);
+  }
+
+  /**
    * @param {!Event} event
    */
   _keyDown(event) {