Test aria-pressed=mixed on windows

ui/accessibility/ax_enums.idl

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // TODO(nektar): Migrate entire file to Mojoq.
 // These should be kept in sync with third_party/WebKit/public/web/WebAXEnums.h
 // until the Chromium and Blink trees are merged.
 [camel_case_enum_to_string=true] namespace ui {
 
   // For new entries to the following four enums, also add to
@@ skipping 211 matching lines @@
     focusable,
     haspopup,
     // Grows horizontally, e.g. most toolbars and separators.
     horizontal,
     hovered,
     invisible,
     linked,
     multiline,
     multiselectable,
     offscreen,
-    pressed,
     protected,
     read_only,
     required,
     richly_editable,
     selectable,
     selected,
     // Grows vertically, e.g. menu or combo box.
     vertical,
     visited
   };
@@ skipping 186 matching lines @@
     // Text attributes.
 
     // Foreground and background color in RGBA.
     background_color,
     color,
 
     // Indicates if a form control has invalid input or
     // if an element has an aria-invalid attribute.
     invalid_state,
 
-    // Of type AXCheckedState
+    // Of type AXButtonState
     checked_state,
+    pressed_state,
 
     // Specifies the direction of the text, e.g., right-to-left.
     text_direction,
 
     // Bold, italic, underline, etc.
     text_style
   };
 
   [cpp_enum_prefix_override="ax_attr"] enum AXFloatAttribute {
     // Range attributes.
@@ skipping 133 matching lines @@
   };
 
   enum AXInvalidState {
     false,
     true,
     spelling,
     grammar,
     other
   };
 
-  enum AXCheckedState {
+  enum AXButtonState {
     false,
     true,
     mixed
   };
 
   enum AXSortDirection {
     unsorted,
     ascending,
     descending,
     other
@@ skipping 57 matching lines @@
     // First node is before the second one.
     before,
 
     // Nodes are the same.
     equal,
 
     // First node is after the second one.
     after
   };
 };