Draw a focus ring around native views when ChromeVox is running.

chrome/common/extensions/api/accessibility_private.json

 // 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.
 
 [
   {
     "namespace": "accessibilityPrivate",
     "compiler_options": {
       "implemented_in": "chrome/browser/accessibility/accessibility_extension_api.h"
     },
@@ skipping 106 matching lines @@
         "type": "object",
         "description": "Information about an alert",
         "properties": {
           "message": {
             "type": "string",
             "description": "The message the alert is showing."
           }
         }
       },
       {
+        "id": "ScreenRect",
+        "type": "object",
+        "description": "Bounding rectangle in global screen coordinates.",
+        "properties": {
+          "left": {"type": "integer", "description": "Left coordinate in global screen coordinates."},
+          "top": {"type": "integer", "description": "Top coordinate in global screen coordinates."},
+          "width": {"type": "integer", "description": "Width in pixels."},
+          "height": {"type": "integer", "description": "Height in pixels."}
+        }
+      },
+      {
         "id": "AccessibilityObject",
         "type": "object",
         "description": "Parent class for accessibility information about an object.",
         "properties": {
           "type": {
             "type": "string",
             "description": "The type of this object, which determines the contents of 'details'.",
             "enum": ["alert", "button", "checkbox", "combobox", "link", "menu", "menuitem", "radiobutton", "slider", "tab", "textbox", "tree", "treeitem", "window"]
           },
           "name": {
@@ skipping 13 matching lines @@
               { "$ref": "ComboBoxDetails" },
               { "$ref": "MenuDetails" },
               { "$ref": "MenuItemDetails" },
               { "$ref": "RadioButtonDetails" },
               { "$ref": "SliderDetails" },
               { "$ref": "TabDetails" },
               { "$ref": "TextBoxDetails" },
               { "$ref": "TreeDetails" },
               { "$ref": "TreeItemDetails" }
             ]
+          },
+          "bounds": {
+            "$ref": "ScreenRect",
+            "description": "The bounds of the object, in global screen coordinates.",
+            "optional": true
           }
         }
-      },
-      {
-        "id": "ScreenRect",
-        "type": "object",
-        "description": "Bounding rectangle in global screen coordinates.",
-        "properties": {
-          "left": {"type": "integer", "description": "Left coordinate in global screen coordinates."},
-          "top": {"type": "integer", "description": "Top coordinate in global screen coordinates."},
-          "width": {"type": "integer", "description": "Width in pixels."},
-          "height": {"type": "integer", "description": "Height in pixels."}
-        }
       }
     ],
     "functions": [
       {
         "name": "setAccessibilityEnabled",
         "type": "function",
         "description": "Enables or disables the accessibility extension api. This must be set to true before event listeners or getFocusedControl will work.",
         "parameters": [
           {
             "type": "boolean",
@@ skipping 181 matching lines @@
           {
             "type": "boolean",
             "name": "makeAnnouncements",
             "description": "Whether to make introductory announcements."
           }
         ]
       }
     ]
   }
 ]