Reorganize accessibility settings.

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_service.h"
+#include "chrome/browser/extensions/extension_tab_util.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/webui/settings_utils.h"
+#include "chrome/common/extensions/extension_constants.h"
+#include "content/public/browser/web_ui.h"
+#include "extensions/browser/extension_registry.h"
+#include "extensions/browser/extension_system.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)));
+}
+
+void AccessibilityHandler::HandleShowChromeVoxSettings(
+    const base::ListValue* args) {
+  ExtensionService* service =
+      extensions::ExtensionSystem::Get(profile_)->extension_service();
+  if (!service->IsExtensionEnabled(extension_misc::kChromeVoxExtensionId))
+    return;
+  const extensions::Extension* extension =
+      service->GetInstalledExtension(extension_misc::kChromeVoxExtensionId);
+  if (!extension)
+    return;
+  extensions::ExtensionTabUtil::OpenOptionsPage(
+      extension,
+      chrome::FindBrowserWithWebContents(web_ui()->GetWebContents()));
+}
+
+}  // namespace settings
+}  // namespace chromeos