Add links to more options pages for Chrome OS accessibility features

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Chrome OS-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>
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   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_FOCUS_HIGHLIGHT_DESCRIPTION" desc="In the settings tab, the text next to the checkbox to highlight the focused object to make it easier to see.">
     Highlight the object with keyboard focus when it changes
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_SELECT_TO_SPEAK_TITLE" desc="In the settings tab, the text next to the checkbox to enable an option to hold a key and click to speak any on-screen text out loud.">
     Select-to-speak
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_SELECT_TO_SPEAK_DESCRIPTION" desc="In the settings tab, the description of an option to hold a key and click to speak any on-screen text out loud.">
     Hold down Search and click or drag to speak anything
   </message>
+  <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_SELECT_TO_SPEAK_OPTIONS_LABEL" desc="In the settings tab, the label for the button that opens the Options page for the Select-to-Speak feature.">
+    Select-to-speak options
+  </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_SWITCH_ACCESS_DESCRIPTION" desc="In the settings tab, the text next to the checkbox to enable switch access (for users with limited motor control).">
     Switch access (control the computer with just one or two switches)
   </message>
+  <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_SWITCH_ACCESS_OPTIONS_LABEL" desc="In the settings tab, the label for the button that opens the Options page for the Switch Access feature.">
+    Switch access options
+  </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_MANAGE_ACCESSIBILITY_FEATURES" desc="In the settings tab, the title of a link that opens a screen allowing the user to change accessibility features.">
     Manage accessibility features
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_TEXT_TO_SPEECH_HEADING" desc="In the settings tab, the heading for accessibility features that enable the computer to speak text from the computer screen.">
     Text-to-Speech
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_DISPLAY_HEADING" desc="In the settings tab, the heading for accessibility features related to the computer's display.">
     Display
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_DISPLAY_SETTINGS_TITLE" desc="In the settings tab, the title of a link to open display settings.">
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   </message>
   <message name="IDS_REQUEST_PIN_DIALOG_PIN" desc="The Provider Identification Number abbreviation">
     PIN
   </message>
   <message name="IDS_REQUEST_PIN_DIALOG_PUK" desc="The Personal Unlocking Key (as used in mobile phones) abbreviation">
     PUK
   </message>
 
 </grit-part>