DevTools: Update CommandMenuProvider on attach instead of construction

third_party/WebKit/Source/devtools/front_end/quick_open/CommandMenu.js

Index: third_party/WebKit/Source/devtools/front_end/quick_open/CommandMenu.js
diff --git a/third_party/WebKit/Source/devtools/front_end/quick_open/CommandMenu.js b/third_party/WebKit/Source/devtools/front_end/quick_open/CommandMenu.js
index 6be020be4c1fe25ddd673f7ce12e8ba16c1376f7..0ca09d36ba28d2e5971804e267708461ab3caed3 100644
--- a/third_party/WebKit/Source/devtools/front_end/quick_open/CommandMenu.js
+++ b/third_party/WebKit/Source/devtools/front_end/quick_open/CommandMenu.js
@@ -113,10 +113,12 @@ QuickOpen.CommandMenuProvider = class extends QuickOpen.FilteredListWidget.Provi
   constructor() {
     super();
     this._commands = [];
-    this._appendAvailableCommands();
   }
 
-  _appendAvailableCommands() {
+  /**
+   * @override
+   */
+  attach() {
     var allCommands = QuickOpen.commandMenu.commands();
 
     // Populate whitelisted actions.
@@ -146,6 +148,13 @@ QuickOpen.CommandMenuProvider = class extends QuickOpen.FilteredListWidget.Provi
 
   /**
    * @override
+   */
+  detach() {
+    this._commands = [];
+  }
+
+  /**
+   * @override
    * @return {number}
    */
   itemCount() {