DevTools: fix NavigatorView exception

third_party/WebKit/Source/devtools/front_end/sources/NavigatorView.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
@@ skipping 299 matching lines @@
     var uiSourceCode = /** @type {!Workspace.UISourceCode} */ (event.data);
     this._removeUISourceCode(uiSourceCode);
   }
 
   /**
    * @param {!Common.Event} event
    */
   _projectRemoved(event) {
     var project = /** @type {!Workspace.Project} */ (event.data);
 
-    var frame = Bindings.NetworkProject.frameForProject(project);
-    if (frame)
-      this._discardFrame(frame);
-
     var uiSourceCodes = project.uiSourceCodes();
     for (var i = 0; i < uiSourceCodes.length; ++i)
       this._removeUISourceCode(uiSourceCodes[i]);
   }
 
   /**
    * @param {!Workspace.Project} project
    * @param {?SDK.Target} target
    * @param {?SDK.ResourceTreeFrame} frame
    * @param {string} projectOrigin
@@ skipping 207 matching lines @@
       var parentNode = node.parent;
       parentNode.removeChild(node);
       node = parentNode;
 
       while (node) {
         parentNode = node.parent;
         if (!parentNode || !node.isEmpty())
           break;
         if (!(node instanceof Sources.NavigatorGroupTreeNode || node instanceof Sources.NavigatorFolderTreeNode))
           break;
-        if (node._type === Sources.NavigatorView.Types.Frame)
+        if (node._type === Sources.NavigatorView.Types.Frame) {
+          this._discardFrame(/** @type {!SDK.ResourceTreeFrame} */ (frame));
           break;
+        }
 
         var folderId = this._folderNodeId(project, target, frame, uiSourceCode.origin(), node._folderPath);
         this._subfolderNodes.delete(folderId);
         parentNode.removeChild(node);
         node = parentNode;
       }
     }
     this._uiSourceCodeNodes.delete(uiSourceCode);
   }
 
@@ skipping 1049 matching lines @@
   /**
    * @param {string} title
    * @override
    */
   setTitle(title) {
     this._title = title;
     if (this._treeElement)
       this._treeElement.title = this._title;
   }
 };