Re-land: Create AXAction and AXActionData as a way to simplify accessibility actions

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 three enums, also add to
+  // For new entries to the following four enums, also add to
   // chrome/common/extensions/api/automation.idl. This is enforced
   // by a PRESUBMIT check.
   //
   // Explanation of the comments next to these events:
   //
   // Web: this event is only used in web content. Unless a specific platform
   //      is specified, it fires a native event on multiple platforms.
   //
   // Native: this event is only used in native UI.
   //
@@ skipping 202 matching lines @@
     read_only,
     required,
     richly_editable,
     selectable,
     selected,
     // Grows vertically, e.g. menu or combo box.
     vertical,
     visited
   };
 
+  // An action to be taken on an accessibility node.
+  enum AXAction {
+    // Do the default action for an object, typically this means "click".
+    do_default,
+
+    // Given a point, find the object it corresponds to and fire a
+    // HOVER event on it in response.
+    hit_test,
+
+    // Scroll any scrollable containers to make the target object visible
+    // on the screen.  Optionally pass a subfocus rect in
+    // AXActionData.target_rect.
+    scroll_to_make_visible,
+
+    // Scroll the given object to a specified point on the screen in
+    // global screen coordinates. Pass a point in AXActionData.target_point.
+    scroll_to_point,
+
+    set_accessibility_focus,
+    set_focus,
+    set_scroll_offset,
+    set_selection,
+    set_value,
+    show_context_menu
+  };
+
+  enum AXActionFlags {
+    request_images,
+    request_inline_text_boxes,
+    set_sequential_focus_navigation_point
+  };
+
   // A change to the accessibility tree.
   enum AXMutation {
     node_created,
     subtree_created,
     node_changed,
     node_removed
   };
 
   [cpp_enum_prefix_override="ax_attr"] enum AXStringAttribute {
     access_key,
@@ skipping 307 matching lines @@
     // First node is before the second one.
     before,
 
     // Nodes are the same.
     equal,
 
     // First node is after the second one.
     after
   };
 };