DevTools: [SASS] implement CSS AST-builder.

third_party/WebKit/Source/devtools/front_end/sass/SASSSupport.js

Index: third_party/WebKit/Source/devtools/front_end/sass/SASSSupport.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sass/SASSSupport.js b/third_party/WebKit/Source/devtools/front_end/sass/SASSSupport.js
index 4c9a9f691ae1182c23a9385a2e2a36d8fbcc84b1..9e4ea5c974d5200668877e101ad08d19c048d2c9 100644
--- a/third_party/WebKit/Source/devtools/front_end/sass/SASSSupport.js
+++ b/third_party/WebKit/Source/devtools/front_end/sass/SASSSupport.js
@@ -5,14 +5,40 @@
 WebInspector.SASSSupport = {}
 
 /**
- * @constructor
+ * @param {!WebInspector.CSSParser} parser
  * @param {string} url
  * @param {string} text
+ * @return {!Promise<!WebInspector.SASSSupport.AST>}
  */
-WebInspector.SASSSupport.ASTDocument = function(url, text)
+WebInspector.SASSSupport.parseCSS = function(parser, url, text)
 {
-    this.url = url;
-    this.text = text;
+    return parser.parsePromise(text)
+        .then(onParsed);
+
+    /**
+     * @param {!Array.<!WebInspector.CSSParser.Rule>} parsedCSS
+     * @return {!WebInspector.SASSSupport.AST}
+     */
+    function onParsed(parsedCSS)
+    {
+        var document = new WebInspector.SASSSupport.ASTDocument(url, text);
+        var rules = [];
+        for (var i = 0; i < parsedCSS.length; ++i) {
+            var rule = parsedCSS[i];
+            if (!rule.properties)
+                continue;
+            var properties = [];
+            for (var j = 0; j < rule.properties.length; ++j) {
+                var cssProperty = rule.properties[j];
+                var name = new WebInspector.SASSSupport.TextNode(document, cssProperty.name, WebInspector.TextRange.fromObject(cssProperty.nameRange));
+                var value = new WebInspector.SASSSupport.TextNode(document, cssProperty.value, WebInspector.TextRange.fromObject(cssProperty.valueRange));
+                var property = new WebInspector.SASSSupport.Property(document, name, value, WebInspector.TextRange.fromObject(cssProperty.range), !!cssProperty.disabled);
+                properties.push(property);
+            }
+            rules.push(new WebInspector.SASSSupport.Rule(document, rule.selectorText, properties));
+        }
+        return new WebInspector.SASSSupport.AST(document, rules);
+    }
 }
 
 /**
@@ -208,6 +234,17 @@ WebInspector.SASSSupport._innerParseSCSS = function(document, tokenizerFactory)
 
 /**
  * @constructor
+ * @param {string} url
+ * @param {string} text
+ */
+WebInspector.SASSSupport.ASTDocument = function(url, text)
+{
+    this.url = url;
+    this.text = text;
+}
+
+/**
+ * @constructor
  * @param {!WebInspector.SASSSupport.ASTDocument} document
  */
 WebInspector.SASSSupport.Node = function(document)