Add links to more options pages for Chrome OS accessibility features

chrome/browser/ui/webui/settings/chromeos/accessibility_handler.h

Index: chrome/browser/ui/webui/settings/chromeos/accessibility_handler.h
diff --git a/chrome/browser/ui/webui/settings/chromeos/accessibility_handler.h b/chrome/browser/ui/webui/settings/chromeos/accessibility_handler.h
index 33e1822724f853936dbf8c39fd26bd8f2e8da986..d03c83e2ea6e308585fe249e69acc9f3b17aef15 100644
--- a/chrome/browser/ui/webui/settings/chromeos/accessibility_handler.h
+++ b/chrome/browser/ui/webui/settings/chromeos/accessibility_handler.h
@@ -32,8 +32,13 @@ class AccessibilityHandler : public ::settings::SettingsPageUIHandler {
   void OnJavascriptDisallowed() override {}
 
  private:
-  // Callback for the "showChromeVoxSettings" message.
+  // Callback for the messages to show settings for ChromeVox,
+  // Select To Speak, or Switch Access.
   void HandleShowChromeVoxSettings(const base::ListValue* args);
+  void HandleShowSelectToSpeakSettings(const base::ListValue* args);
+  void HandleShowSwitchAccessSettings(const base::ListValue* args);
+
+  void OpenExtensionOptionsPage(const char extension_id[]);
 
   Profile* profile_;  // Weak pointer.