DevTools: [SASS] introduce Gonzales-PE for SCSS parsing

third_party/WebKit/Source/devtools/front_end/formatter_worker/FormatterWorker.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 51 matching lines @@
     if (!method)
         return;
 
     switch (method) {
     case "format":
         WebInspector.format(params.mimeType, params.content, params.indentString);
         break;
     case "parseCSS":
         WebInspector.parseCSS(params.content);
         break;
+    case "parseSCSS":
+        WebInspector.FormatterWorkerContentParser.parse(params.content, "text/x-scss");
+        break;
     case "javaScriptOutline":
         WebInspector.javaScriptOutline(params.content);
         break;
     case "javaScriptIdentifiers":
         WebInspector.javaScriptIdentifiers(params.content);
         break;
     case "evaluatableJavaScriptSubstring":
         WebInspector.evaluatableJavaScriptSubstring(params.content);
         break;
     case "relaxedJSONParser":
@@ skipping 139 matching lines @@
         }
         result.mapping = builder.mapping();
         result.content = builder.content();
     } catch (e) {
         console.error(e);
         result.mapping = { original: [0], formatted: [0] };
         result.content = text;
     }
     postMessage(result);
 }
+
+/**
+ * @interface
+ */
+WebInspector.FormatterWorkerContentParser = function() { }
+
+WebInspector.FormatterWorkerContentParser.prototype = {
+    /**
+     * @param {string} content
+     * @return {!Object}
+     */
+    parse: function(content) { }
+}
+
+WebInspector.FormatterWorkerContentParser.parse = function(content, mimeType)
+{
+    var extension = self.runtime.extensions(WebInspector.FormatterWorkerContentParser).find(findExtension);
+    console.assert(extension);
+    extension.instancePromise()
+        .then(instance => instance.parse(content))
+        .catchException(null)
+        .then(postMessage);
+
+    /**
+     * @param {!Runtime.Extension} extension
+     * @return {boolean}
+     */
+    function findExtension(extension)
+    {
+        return extension.descriptor()["mimeType"] === mimeType;
+    }
+}