DevTools: [SASS] implement CSS AST-builder.

third_party/WebKit/LayoutTests/inspector/sass/test-ast-css-3-expected.txt

Index: third_party/WebKit/LayoutTests/inspector/sass/test-ast-css-3-expected.txt
diff --git a/third_party/WebKit/LayoutTests/inspector/sass/test-ast-css-3-expected.txt b/third_party/WebKit/LayoutTests/inspector/sass/test-ast-css-3-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..48528d9dae4ffaaef113660f5fb3238cc486016c
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/inspector/sass/test-ast-css-3-expected.txt
@@ -0,0 +1,47 @@
+Verifies AST of CSS with missing trailing semicolon after last property.
+
+body {
+    /* padding-top: 5em; */
+    margin: 0 auto
+}
+
+body {
+    color: red;
+    /* margin: 0 auto */
+}
+
+=== AST === 
+rule 0: "body"
+    property 0
+        name: "padding-top"
+            range: {"startLine":1,"startColumn":7,"endLine":1,"endColumn":18}
+        value: " 5em"
+            range: {"startLine":1,"startColumn":19,"endLine":1,"endColumn":23}
+        range: {"startLine":1,"startColumn":4,"endLine":1,"endColumn":27}
+        disabled: true
+    property 1
+        name: "margin"
+            range: {"startLine":2,"startColumn":4,"endLine":2,"endColumn":10}
+        value: " 0 auto
+"
+            range: {"startLine":2,"startColumn":11,"endLine":3,"endColumn":0}
+        range: {"startLine":2,"startColumn":4,"endLine":3,"endColumn":0}
+        disabled: false
+rule 1: "body"
+    property 0
+        name: "color"
+            range: {"startLine":6,"startColumn":4,"endLine":6,"endColumn":9}
+        value: " red"
+            range: {"startLine":6,"startColumn":10,"endLine":6,"endColumn":14}
+        range: {"startLine":6,"startColumn":4,"endLine":6,"endColumn":15}
+        disabled: false
+    property 1
+        name: "margin"
+            range: {"startLine":7,"startColumn":7,"endLine":7,"endColumn":13}
+        value: " 0 auto "
+            range: {"startLine":7,"startColumn":14,"endLine":7,"endColumn":22}
+        range: {"startLine":7,"startColumn":4,"endLine":7,"endColumn":24}
+        disabled: true
+======
+Ranges OK.
+