AX checked state changes

ui/accessibility/ax_enums.idl

Index: ui/accessibility/ax_enums.idl
diff --git a/ui/accessibility/ax_enums.idl b/ui/accessibility/ax_enums.idl
index 2016c2419ef1d90afc6b4fe1862df727a23e50f0..fddb848521b4e30c4c8264edd3a70af8547d6c1d 100644
--- a/ui/accessibility/ax_enums.idl
+++ b/ui/accessibility/ax_enums.idl
@@ -212,7 +212,6 @@
 
   enum AXState {
     busy,
-    checked,
     collapsed,
     default,
     disabled,
@@ -431,6 +430,9 @@
     // if an element has an aria-invalid attribute.
     invalid_state,
 
+    // Unchecked (0), Checked (1), Mixed (2)

[dmazzoni, 2017/02/28 00:10:50]

Don't specify the enum values, just say it's of
type AXCheckedState

+    checked_state,
+
     // Specifies the direction of the text, e.g., right-to-left.
     text_direction,
 
@@ -450,10 +452,6 @@
   };
 
   [cpp_enum_prefix_override="ax_attr"] enum AXBoolAttribute {
-    // True if an ARIA toggle button, a checkbox or
-    // a menu item checkbox is in the "mixed" state.
-    STATE_mixed,
-
     // Live region attributes.
     container_live_atomic,
     container_live_busy,
@@ -589,6 +587,12 @@
     other
   };
 
+  enum AXCheckedState {
+    false,
+    true,
+    mixed
+  };
+
   enum AXSortDirection {
     unsorted,
     ascending,