Update rust-selectors

This commits updates rust-selectors to use the generic parser, and as
such it moves the element state into the style crate.

components/style/element_state.rs

@@ -0,0 +1,31 @@
+/* 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/. */
+
+bitflags! {
+    #[doc = "Event-based element states."]
+    #[derive(HeapSizeOf)]
+    flags ElementState: u8 {
+        #[doc = "The mouse is down on this element. \
+                 https://html.spec.whatwg.org/multipage/#selector-active \
+                 FIXME(#7333): set/unset this when appropriate"]
+        const IN_ACTIVE_STATE = 0x01,
+        #[doc = "This element has focus. \
+                 https://html.spec.whatwg.org/multipage/#selector-focus"]
+        const IN_FOCUS_STATE = 0x02,
+        #[doc = "The mouse is hovering over this element. \
+                 https://html.spec.whatwg.org/multipage/#selector-hover"]
+        const IN_HOVER_STATE = 0x04,
+        #[doc = "Content is enabled (and can be disabled). \
+                 http://www.whatwg.org/html/#selector-enabled"]
+        const IN_ENABLED_STATE = 0x08,
+        #[doc = "Content is disabled. \
+                 http://www.whatwg.org/html/#selector-disabled"]
+        const IN_DISABLED_STATE = 0x10,
+        #[doc = "Content is checked. \
+                 https://html.spec.whatwg.org/multipage/#selector-checked"]
+        const IN_CHECKED_STATE = 0x20,
+        #[doc = "https://html.spec.whatwg.org/multipage/#selector-indeterminate"]
+        const IN_INDETERMINATE_STATE = 0x40,
+    }
+}