Introduce ServoParser

This is a common inline parent to ServoHTMLParser and ServoXMLParser.

components/script/dom/servoparser.rs

@@ -0,0 +1,18 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use dom::bindings::reflector::Reflector;
+
+#[dom_struct]
+pub struct ServoParser {
+    reflector: Reflector,
+}
+
+impl ServoParser {
+    pub fn new_inherited() -> Self {
+        ServoParser {
+            reflector: Reflector::new(),
+        }
+    }
+}