Set keys for SwitchAccessEventHandler to capture using accessibiltyPrivate API

chrome/browser/chromeos/accessibility/switch_access_event_handler.h

 // Copyright 2017 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 CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_SWITCH_ACCESS_EVENT_HANDLER_H_
 #define CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_SWITCH_ACCESS_EVENT_HANDLER_H_
 
+#include <set>
+
 #include "base/macros.h"
 #include "ui/events/event_handler.h"
 
 namespace chromeos {
 
 // When Switch Access is enabled, intercepts a few keys before the rest of the
 // OS has a chance to handle them, as a method for controlling the entire OS
 // with a small number of switches. The key events do not propagate to the rest
 // of the system.
 //
 // This class just intercepts the keys and forwards them to the component
 // extension.
 class SwitchAccessEventHandler : public ui::EventHandler {
  public:
   SwitchAccessEventHandler();
   ~SwitchAccessEventHandler() override;
 
+  void SetKeysToCapture(const std::set<int>& key_codes);
+
  private:
   // EventHandler:
   void OnKeyEvent(ui::KeyEvent* event) override;
 
   void CancelEvent(ui::Event* event);
   void DispatchKeyEventToSwitchAccess(const ui::KeyEvent& event);
 
+  std::set<int> captured_keys_;
+
   DISALLOW_COPY_AND_ASSIGN(SwitchAccessEventHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_SWITCH_ACCESS_EVENT_HANDLER_H_