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

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- ChromeOS-specific strings (included from generated_resources.grd).
      Everything in this file is wrapped in <if expr="chromeos">. -->
 <grit-part>
   <message name="IDS_EMPTY_STRING" desc="Empty string, exist only to make code generic. No translation required.">
   </message>
   <!-- Idle logout dialog for retail mode -->
   <message name="IDS_IDLE_LOGOUT_TITLE" desc="Dialog title for the idle logout dialog. Used in retail mode only.">
     Are you still there?
   </message>
@@ skipping 2420 matching lines @@
   <message name="IDS_OPTIONS_SETTINGS_BLUETOOTH_DISCONNECT_FAILED">
     Failed to disconnect from "<ph name="DEVICE_NAME">%1<ex>Nexus S</ex></ph>".
   </message>
   <message name="IDS_OPTIONS_SETTINGS_BLUETOOTH_FORGET_FAILED">
     Failed to disconnect and unpair from "<ph name="DEVICE_NAME">%1<ex>Nexus S</ex></ph>".
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_EXPLANATION" desc="In the settings tab, this text explains the accessibility features.">
     Enable accessibility features to make your device easier to use.
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_SETTINGS" desc="Text of the link to open ChromeVox settings.">
-    Settings
+    ChromeVox Settings
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_TALKBACK_SETTINGS" desc="Text of the link to open TalkBack settings.">
+    TalkBack Settings
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_LARGE_CURSOR_DESCRIPTION" desc="In the settings tab, the text next to the checkbox for the large mouse cursor.">
     Show large mouse cursor
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_SPOKEN_FEEDBACK_DESCRIPTION" desc="In the settings tab, the text next to the checkbox for spoken feedback.">
     Enable ChromeVox (spoken feedback)
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_HIGH_CONTRAST_DESCRIPTION" desc="In the settings tab, the text next to the checkbox for high contrast mode.">
     Use high contrast mode
   </message>
@@ skipping 4502 matching lines @@
   <message name="IDS_CRITICALLY_LOW_DISK_NOTIFICATION_TITLE" desc="Title of the notification warning users that they are critically low on disk space.">
     Device disk space critically low
   </message>
   <message name="IDS_CRITICALLY_LOW_DISK_NOTIFICATION_MESSAGE" desc="Notification text warning users that they are critically low on disk space.">
     Free up disk space or device will become unresponsive.
   </message>
   <message name="IDS_LOW_DISK_NOTIFICATION_BUTTON" desc="Button on the low disk notification to open storage management.">
     Manage storage
   </message>
 </grit-part>