DevTools: Implement CSS pretty-printing

Source/devtools/front_end/ScriptFormatter.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 @@
 WebInspector.Formatter = function()
 {
 }
 
 /**
  * @param {WebInspector.ResourceType} contentType
  * @return {?WebInspector.Formatter}
  */
 WebInspector.Formatter.createFormatter = function(contentType)
 {
-    if (contentType === WebInspector.resourceTypes.Script || contentType === WebInspector.resourceTypes.Document)
+    if (contentType === WebInspector.resourceTypes.Script || contentType === WebInspector.resourceTypes.Document || contentType === WebInspector.resourceTypes.Stylesheet)
         return new WebInspector.ScriptFormatter();
     return new WebInspector.IdentityFormatter();
 }
 
 /**
  * @param {Array.<number>} lineEndings
  * @param {number} lineNumber
  * @param {number} columnNumber
  * @return {number}
  */
@@ skipping 206 matching lines @@
      */
     _convertPosition: function(positions1, positions2, position)
     {
         var index = positions1.upperBound(position) - 1;
         var convertedPosition = positions2[index] + position - positions1[index];
         if (index < positions2.length - 1 && convertedPosition > positions2[index + 1])
             convertedPosition = positions2[index + 1];
         return convertedPosition;
     }
 }