DevTools: Add JSDoc for static methods, fix JSDoc types and induced errors

Source/devtools/front_end/source_frame/ResourceView.js

 /*
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) IBM Corp. 2009  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 49 matching lines @@
 {
     if (resource.type.isTextType())
         return true;
     if (resource.type === WebInspector.resourceTypes.Other)
         return !!resource.content && !resource.contentEncoded;
     return false;
 }
 
 /**
  * @param {!WebInspector.Resource} resource
+ * @return {!WebInspector.ResourceView}
  */
 WebInspector.ResourceView.nonSourceViewForResource = function(resource)
 {
     switch (resource.type) {
     case WebInspector.resourceTypes.Image:
         return new WebInspector.ImageView(resource);
     case WebInspector.resourceTypes.Font:
         return new WebInspector.FontView(resource);
     default:
         return new WebInspector.ResourceView(resource);
@@ skipping 50 matching lines @@
     /**
      * @param {?string} content
      */
     _contentLoaded: function(content)
     {
         this._content.textContent = content;
     },
 
     __proto__: WebInspector.VBox.prototype
 }