DevTools: [SASS] parse SCSS rules and their selectors.

third_party/WebKit/LayoutTests/inspector/sass/test-ast-scss-4-expected.txt

 Verifies AST of SCSS with media query.
 
 @media (min-device-width: 720px) {
     body {
         width: 720px;
         /* padding-top: 5em; */
         height: 100%;
         margin: 0 auto;
     }
 }
 
 === AST === 
-rule 0: "variables"
-rule 1: "properties"
+rule 0: "body"
     property 0
         name: "width"
             range: {"startLine":2,"startColumn":8,"endLine":2,"endColumn":13}
         value: " 720px"
             range: {"startLine":2,"startColumn":14,"endLine":2,"endColumn":20}
         range: {"startLine":2,"startColumn":8,"endLine":2,"endColumn":21}
         disabled: false
     property 1
         name: "padding-top"
             range: {"startLine":3,"startColumn":11,"endLine":3,"endColumn":22}
         value: " 5em"
             range: {"startLine":3,"startColumn":23,"endLine":3,"endColumn":27}
         range: {"startLine":3,"startColumn":8,"endLine":3,"endColumn":31}
         disabled: true
     property 2
         name: "height"
             range: {"startLine":4,"startColumn":8,"endLine":4,"endColumn":14}
         value: " 100%"
             range: {"startLine":4,"startColumn":15,"endLine":4,"endColumn":20}
         range: {"startLine":4,"startColumn":8,"endLine":4,"endColumn":21}
         disabled: false
     property 3
         name: "margin"
             range: {"startLine":5,"startColumn":8,"endLine":5,"endColumn":14}
         value: " 0 auto"
             range: {"startLine":5,"startColumn":15,"endLine":5,"endColumn":22}
         range: {"startLine":5,"startColumn":8,"endLine":5,"endColumn":23}
         disabled: false
-rule 2: "mixins"
 ======
 Ranges OK.