DevTools: Code fixes for the Closure compiler roll

Source/devtools/front_end/network/RequestView.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 38 matching lines @@
     hasContent: function()
     {
         return false;
     },
 
     __proto__: WebInspector.VBox.prototype
 }
 
 /**
  * @param {!WebInspector.NetworkRequest} request
+ * @return {boolean}
  */
 WebInspector.RequestView.hasTextContent = function(request)
 {
     if (request.type.isTextType())
         return true;
     if (request.type === WebInspector.resourceTypes.Other || request.hasErrorStatusCode())
-        return request.content && !request.contentEncoded;
+        return !!request.content && !request.contentEncoded;
     return false;
 }
 
 /**
  * @param {!WebInspector.NetworkRequest} request
+ * @return {!WebInspector.View}
  */
 WebInspector.RequestView.nonSourceViewForRequest = function(request)
 {
     switch (request.type) {
     case WebInspector.resourceTypes.Image:
         return new WebInspector.ImageView(request);
     case WebInspector.resourceTypes.Font:
         return new WebInspector.FontView(request);
     default:
         return new WebInspector.RequestView(request);
     }
 }