DevTools: do not show "there are unsaved changes" dialog for network resources

Source/devtools/front_end/workspace/Workspace.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 582 matching lines @@
     ProjectAdded: "ProjectAdded",
     ProjectRemoved: "ProjectRemoved"
 }
 
 WebInspector.Workspace.prototype = {
     /**
      * @return {!Array.<!WebInspector.UISourceCode>}
      */
     unsavedSourceCodes: function()
     {
+        /**
+         * @param {!WebInspector.UISourceCode} sourceCode
+         * @return {boolean}
+         */
         function filterUnsaved(sourceCode)
         {
             return sourceCode.isDirty();
         }
-        return this.uiSourceCodes().filter(filterUnsaved);
+
+        var unsavedSourceCodes = [];
+        var projects = this.projectsForType(WebInspector.projectTypes.FileSystem);
+        for (var i = 0; i < projects.length; ++i)
+            unsavedSourceCodes = unsavedSourceCodes.concat(projects[i].uiSourceCodes().filter(filterUnsaved));
+
+        return unsavedSourceCodes;
     },
 
     /**
      * @param {string} projectId
      * @param {string} path
      * @return {?WebInspector.UISourceCode}
      */
     uiSourceCode: function(projectId, path)
     {
         var project = this._projects[projectId];
@@ skipping 227 matching lines @@
         this.addEventListener(WebInspector.Workspace.Events.UISourceCodeAdded, listener, this);
     },
 
     __proto__: WebInspector.Object.prototype
 }
 
 /**
  * @type {!WebInspector.Workspace}
  */
 WebInspector.workspace;