DevTools: Code fixes for the Closure compiler roll

Source/devtools/front_end/network/RequestJSONView.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 23 matching lines @@
  * @param {!WebInspector.NetworkRequest} request
  * @param {!WebInspector.ParsedJSON} parsedJSON
  */
 WebInspector.RequestJSONView = function(request, parsedJSON)
 {
     WebInspector.RequestView.call(this, request);
     this._parsedJSON = parsedJSON;
     this.element.classList.add("json");
 }
 
+/**
+ * @param {string} text
+ * @return {?WebInspector.ParsedJSON}
+ */
 WebInspector.RequestJSONView.parseJSON = function(text)
 {
     var prefix = "";
 
     // Trim while(1), for(;;), weird numbers, etc. We need JSON start.
     var start = /[{[]/.exec(text);
     if (start && start.index) {
         prefix = text.substring(0, start.index);
         text = text.substring(start.index);
     }
 
     try {
         return new WebInspector.ParsedJSON(JSON.parse(text), prefix, "");
     } catch (e) {
-        return;
+        return null;
     }
 }
 
+/**
+ * @param {string} text
+ * @return {?WebInspector.ParsedJSON}
+ */
 WebInspector.RequestJSONView.parseJSONP = function(text)
 {
     // Taking everything between first and last parentheses
     var start = text.indexOf("(");
     var end = text.lastIndexOf(")");
     if (start == -1 || end == -1 || end < start)
-        return;
+        return null;
 
     var prefix = text.substring(0, start + 1);
     var suffix = text.substring(end);
     text = text.substring(start + 1, end);
 
     try {
         return new WebInspector.ParsedJSON(JSON.parse(text), prefix, suffix);
     } catch (e) {
-        return;
+        return null;
     }
 }
 
 WebInspector.RequestJSONView.prototype = {
     /**
      * @return {boolean}
      */
     hasContent: function()
     {
         return true;
@@ skipping 23 matching lines @@
 
 /**
  * @constructor
  */
 WebInspector.ParsedJSON = function(data, prefix, suffix)
 {
     this.data = data;
     this.prefix = prefix;
     this.suffix = suffix;
 }