Upstreaming AppMenu.

chrome/android/java/strings/android_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <grit current_release="1" latest_public_release="0">
   <release allow_pseudo="false" seq="1">
     <messages fallback_to_english="true">
       <message desc="Popup button for user to confirm a beforeunload dialog box triggered by a page navigation, i.e. they want to leave the current page [CHAR-LIMIT=20]" name="IDS_LEAVE_THIS_PAGE">
         Leave this Page
       </message>
       <message desc="Popup button for user to cancel a beforeunload dialog box triggerd by a page navigation, i.e. they want to stay on the current page [CHAR-LIMIT=20]" name="IDS_STAY_ON_THIS_PAGE">
         Stay on this Page
       </message>
@@ skipping 109 matching lines @@
       </message>
       <message name="IDS_TRANSLATE_NEVER_TRANSLATE_LANGUAGE" meaning="Android" desc="Text to display on the never translate language button. [CHAR-LIMIT=64]">
         Never translate <ph name="LANGUAGE">%1$s<ex>French</ex></ph>
       </message>
       <message name="IDS_MENU_PRINT" desc="Menu item for printing the current page. [CHAR-LIMIT=27]">
         Print…
       </message>
       <message name="IDS_ERROR_PRINTING_FAILED" desc="Generic error message shown when Chrome fails to print the current page for some reason.">
         There was a problem printing the page. Please try again.
       </message>
+      <message name="IDS_ACCESSIBILITY_MENU_BOOKMARK" desc="Content description for the bookmark button when the page is not currently bookmarked.">
+        Bookmark page
+      </message>
+      <message name="IDS_ACCESSIBILITY_MENU_EDIT_BOOKMARK" desc="Content description for the bookmark button when the page is currently bookmarked.">
+        Edit bookmark page
+      </message>
+      <message name="IDS_ACCESSIBILITY_MENU_FORWARD" desc="Content description for the forward navigation button.">
+        Go forward
+      </message>
+      <message name="IDS_ACCESSIBILITY_MENU_BACK" desc="Content description for the backard navigation button.">
+        Go back
+      </message>
     </messages>
   </release>
   <translations>
     <file lang="am" path="translations/android_chrome_strings_am.xtb" />
     <file lang="ar" path="translations/android_chrome_strings_ar.xtb" />
     <file lang="bg" path="translations/android_chrome_strings_bg.xtb" />
     <file lang="ca" path="translations/android_chrome_strings_ca.xtb" />
     <file lang="cs" path="translations/android_chrome_strings_cs.xtb" />
     <file lang="da" path="translations/android_chrome_strings_da.xtb" />
     <file lang="de" path="translations/android_chrome_strings_de.xtb" />
@@ skipping 74 matching lines @@
     <output filename="values-sv/android_chrome_strings.xml" lang="sv" type="android" />
     <output filename="values-sw/android_chrome_strings.xml" lang="sw" type="android" />
     <output filename="values-th/android_chrome_strings.xml" lang="th" type="android" />
     <output filename="values-tr/android_chrome_strings.xml" lang="tr" type="android" />
     <output filename="values-uk/android_chrome_strings.xml" lang="uk" type="android" />
     <output filename="values-vi/android_chrome_strings.xml" lang="vi" type="android" />
     <output filename="values-zh-rCN/android_chrome_strings.xml" lang="zh-CN" type="android" />
     <output filename="values-zh-rTW/android_chrome_strings.xml" lang="zh-TW" type="android" />
   </outputs>
 </grit>