Add links to more options pages for Chrome OS accessibility features

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

 // Copyright 2016 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.
 
 #include "chrome/browser/ui/webui/settings/chromeos/accessibility_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "content/public/browser/web_ui.h"
 #include "extensions/browser/extension_registry.h"
 
 namespace chromeos {
 namespace settings {
 
 AccessibilityHandler::AccessibilityHandler(content::WebUI* webui)
     : profile_(Profile::FromWebUI(webui)) {
 }
 
 AccessibilityHandler::~AccessibilityHandler() {}
 
 void AccessibilityHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback(
       "showChromeVoxSettings",
       base::Bind(&AccessibilityHandler::HandleShowChromeVoxSettings,
                  base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
+      "showSelectToSpeakSettings",
+      base::Bind(&AccessibilityHandler::HandleShowSelectToSpeakSettings,
+                 base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
+      "showSwitchAccessSettings",
+      base::Bind(&AccessibilityHandler::HandleShowSwitchAccessSettings,
+                 base::Unretained(this)));
 }
 
 void AccessibilityHandler::HandleShowChromeVoxSettings(
     const base::ListValue* args) {
-  const extensions::Extension* chromevox_extension =
+  OpenExtensionOptionsPage(extension_misc::kChromeVoxExtensionId);
+}
+
+void AccessibilityHandler::HandleShowSelectToSpeakSettings(
+    const base::ListValue* args) {
+  OpenExtensionOptionsPage(extension_misc::kSelectToSpeakExtensionId);
+}
+
+void AccessibilityHandler::HandleShowSwitchAccessSettings(
+    const base::ListValue* args) {
+  OpenExtensionOptionsPage(extension_misc::kSwitchAccessExtensionId);
+}
+
+void AccessibilityHandler::OpenExtensionOptionsPage(const char extension_id[]) {
+  const extensions::Extension* extension =
       extensions::ExtensionRegistry::Get(profile_)->GetExtensionById(
-          extension_misc::kChromeVoxExtensionId,
-          extensions::ExtensionRegistry::ENABLED);
-  if (!chromevox_extension)
+          extension_id, extensions::ExtensionRegistry::ENABLED);
+  if (!extension)
     return;
   extensions::ExtensionTabUtil::OpenOptionsPage(
-      chromevox_extension,
+      extension,
       chrome::FindBrowserWithWebContents(web_ui()->GetWebContents()));
 }
 
 }  // namespace settings
 }  // namespace chromeos