DevTools: remove "type" getters in Resource and NetworkRequest.

Source/devtools/front_end/network/RequestPreviewView.js

 /*
  * Copyright (C) 2011 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 104 matching lines @@
             if (jsonView)
                 return jsonView;
         }
 
         if (this.request.hasErrorStatusCode()) {
             var htmlErrorPreview = this._htmlErrorPreview();
             if (htmlErrorPreview)
                 return htmlErrorPreview;
         }
 
-        if (this.request.type === WebInspector.resourceTypes.XHR) {
+        if (this.request.resourceType() === WebInspector.resourceTypes.XHR) {
             var jsonView = this._jsonView();
             if (jsonView)
                 return jsonView;
             var htmlErrorPreview = this._htmlErrorPreview();
             if (htmlErrorPreview)
                 return htmlErrorPreview;
         }
 
         if (this._responseView.sourceView)
             return this._responseView.sourceView;
 
-        if (this.request.type === WebInspector.resourceTypes.Other)
+        if (this.request.resourceType() === WebInspector.resourceTypes.Other)
             return this._createEmptyView();
 
         return WebInspector.RequestView.nonSourceViewForRequest(this.request);
     },
 
     __proto__: WebInspector.RequestContentView.prototype
 }