Set keys for SwitchAccessEventHandler to capture using accessibiltyPrivate API

extensions/browser/extension_function_histogram_value.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_
 #define EXTENSIONS_BROWSER_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_
 
 namespace extensions {
 namespace functions {
 
@@ skipping 1220 matching lines @@
   // This does not follow the naming convesion, but follows the other APIs in
   // webrtcAudioPrivate.
   WEBRTC_AUDIO_PRIVATE_SET_AUDIO_EXPERIMENTS,
   AUTOTESTPRIVATE_GETPLAYSTORESTATE,
   AUTOTESTPRIVATE_SETPLAYSTOREENABLED,
   APP_CURRENTWINDOWINTERNAL_SETACTIVATEONPOINTER,
   MEDIAPERCEPTIONPRIVATE_GETSTATE,
   MEDIAPERCEPTIONPRIVATE_SETSTATE,
   MEDIAPERCEPTIONPRIVATE_GETDIAGNOSTICS,
   NETWORKINGPRIVATE_GETCERTIFICATELISTS,
+  ACCESSIBILITY_PRIVATE_SETSWITCHACCESSKEYS,
   // Last entry: Add new entries above, then run:
   // python tools/metrics/histograms/update_extension_histograms.py
   ENUM_BOUNDARY
 };
 
 }  // namespace functions
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSION_FUNCTION_HISTOGRAM_VALUE_H_