Add a button to open TalkBack settings in chrome://settings.

chrome/browser/ui/app_list/arc/arc_app_utils.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_UTILS_H_
 #define CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_UTILS_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 24 matching lines @@
 // to place it.
 bool LaunchApp(content::BrowserContext* context,
                const std::string& app_id,
                bool landscape_layout);
 
 // Launch an app and place it at the specified coordinates.
 bool LaunchAppWithRect(content::BrowserContext* context,
                        const std::string& app_id,
                        const gfx::Rect& target_rect);
 
+// Open TalkBack settings window.
+void ShowTalkBackSettings();
+
 // Tests if the application can use the given target resolution.
 // The callback will receive the information once known.
 // A false will get returned if the result cannot be determined in which case
 // the callback will not be called.
 bool CanHandleResolution(content::BrowserContext* context,
     const std::string& app_id,
     const gfx::Rect& rect,
     const CanHandleResolutionCallback& callback);
 
 // Uninstalls the package in ARC.
 void UninstallPackage(const std::string& package_name);
 
 // Removes cached app shortcut icon in ARC.
 void RemoveCachedIcon(const std::string& icon_resource_id);
 
 // Show package info for ARC package.
 // Deprecated. Use ShowPackageInfoOnPage.
 bool ShowPackageInfo(const std::string& package_name);
 
 // Show package info for ARC package at the specified page.
 bool ShowPackageInfoOnPage(const std::string& package_name,
                            mojom::ShowPackageInfoPage page);
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_ARC_ARC_APP_UTILS_H_