[DevTools] Fixed blink of "No Event Listeners" in event listeners sidebar

Source/devtools/front_end/sources/ObjectEventListenersSidebarPane.js

Index: Source/devtools/front_end/sources/ObjectEventListenersSidebarPane.js
diff --git a/Source/devtools/front_end/sources/ObjectEventListenersSidebarPane.js b/Source/devtools/front_end/sources/ObjectEventListenersSidebarPane.js
index e9ad6c6b0b48b26172119691adfc46b2762d05b2..6d42d405aa3ad43a34c5b44a70c72adb643e5d01 100644
--- a/Source/devtools/front_end/sources/ObjectEventListenersSidebarPane.js
+++ b/Source/devtools/front_end/sources/ObjectEventListenersSidebarPane.js
@@ -28,12 +28,13 @@ WebInspector.ObjectEventListenersSidebarPane.prototype = {
             this._lastRequestedContext.target().runtimeAgent().releaseObjectGroup(WebInspector.ObjectEventListenersSidebarPane._objectGroupName);
             delete this._lastRequestedContext;
         }
-        this._eventListenersView.reset();
         var executionContext = WebInspector.context.flavor(WebInspector.ExecutionContext);
-        if (!executionContext)
+        if (!executionContext) {
+            this._eventListenersView.reset();

[lushnikov, 2015/06/17 14:44:50]

addEmptyHolderIfNeeded

[kozy, 2015/06/17 15:54:32]

Done.

             return;
+        }
         this._lastRequestedContext = executionContext;
-        this._windowObjectInContext(executionContext).then(this._eventListenersView.addObjectEventListeners.bind(this._eventListenersView));
+        Promise.all([this._windowObjectInContext(executionContext)]).then(this._eventListenersView.addObjects.bind(this._eventListenersView));
     },
 
     expand: function()
@@ -49,7 +50,6 @@ WebInspector.ObjectEventListenersSidebarPane.prototype = {
     _windowObjectInContext: function(executionContext)
     {
         return new Promise(windowObjectInContext);
-
         /**
          * @param {function(?)} fulfill
          * @param {function(*)} reject