Security panel: observe targets before adding listeners.

Source/devtools/front_end/security/SecurityPanel.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @constructor
  * @extends {WebInspector.PanelWithSidebar}
  * @implements {WebInspector.TargetManager.Observer}
  */
 WebInspector.SecurityPanel = function()
@@ skipping 16 matching lines @@
     this._sidebarOriginSection = new WebInspector.SidebarSectionTreeElement(WebInspector.UIString("Origins"));
     this._sidebarOriginSection.listItemElement.classList.add("security-sidebar-origins");
     sidebarTree.appendChild(this._sidebarOriginSection);
 
     this._mainView = new WebInspector.SecurityMainView();
 
     /** @type {!Map<!WebInspector.SecurityPanel.Origin, !WebInspector.SecurityPanel.OriginState>} */
     this._origins = new Map();
     // TODO(lgarron): add event listeners to call _clear() once we figure out how to clear the panel properly (https://crbug.com/522762).
 
+    WebInspector.targetManager.observeTargets(this);
+
     WebInspector.targetManager.addModelListener(WebInspector.NetworkManager, WebInspector.NetworkManager.EventTypes.ResponseReceivedSecurityDetails, this._onResponseReceivedSecurityDetails, this);
     WebInspector.targetManager.addModelListener(WebInspector.SecurityModel, WebInspector.SecurityModel.EventTypes.SecurityStateChanged, this._onSecurityStateChanged, this);
-
-    WebInspector.targetManager.observeTargets(this);
 }
 
 /** @typedef {string} */
 WebInspector.SecurityPanel.Origin;
 
 /**
  * @typedef {Object}
  * @property {!SecurityAgent.SecurityState} securityState - Current security state of the origin.
  * @property {?NetworkAgent.SecurityDetails} securityDetails - Security details of the origin, if available.
  * @property {?NetworkAgent.CertificateDetails} securityDetails.certificateDetails - Certificate details of the origin (attached to security details), if available.
@@ skipping 496 matching lines @@
 
         var valueDiv = row.createChild("div");
         if (value instanceof HTMLDivElement) {
             valueDiv.appendChild(value);
         } else {
             valueDiv.textContent = value;
         }
     }
 }