Set keys for SwitchAccessEventHandler to capture using accessibiltyPrivate API

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 82 matching lines @@
         "name": "darkenScreen",
         "type": "function",
         "description": "Darkens or undarkens the screen.",
         "parameters": [
           {
             "type": "boolean",
             "name": "enabled",
             "description": "True to darken screen; false to undarken screen."
           }
         ]
+      },
+      {
+        "name": "setSwitchAccessKeys",
+        "type": "function",
+        "description": "Change the keyboard keys captured by Switch Access.",
+        "parameters": [
+          {
+            "name": "key_codes",
+            "type": "array",
+            "items": {
+              "type": "integer",
+              "minimum": 48, // '0' key
+              "maximum": 90  // 'z' key
+            },
+            "description": "The key codes for the keys that will be captured."
+          }
+        ],
+        "platforms": ["chromeos"]
       }
     ],
     "events": [
       {
         "name": "onIntroduceChromeVox",
         "type": "function",
         "description": "Fired whenever ChromeVox should output introduction."
       },
       {
         "name": "onAccessibilityGesture",
@@ skipping 14 matching lines @@
       },
       {
         "name": "onTwoFingerTouchStop",
         "type": "function",
         "description": "Fired when  the user is no longer holding down two fingers (including releasing one, holding down three, or moving them).",
         "parameters": []
       }
     ]
   }
 ]