Improve android tab content description

chrome/android/java/strings/android_chrome_strings.grd

Index: chrome/android/java/strings/android_chrome_strings.grd
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index bd4e11d661ca4fac30add424ddbd4fb65eb51647..41f3c2d4bcab42db3a724fed466d926dfd16a1ab 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -2167,6 +2167,18 @@ You are signing in with a managed account and giving its administrator control o
       <message name="IDS_ACCESSIBILITY_TABSTRIP_BTN_INCOGNITO_TOGGLE_INCOGNITO" desc="Content description for the incognito tabs toggle button when viewing incognito tabs.">
         Leave incognito mode
       </message>
+      <message name="IDS_ACCESSIBILITY_TABSTRIP_IDENTIFIER" desc="Content description for tabs that are not selected">
+        Tab
+      </message>
+      <message name="IDS_ACCESSIBILITY_TABSTRIP_IDENTIFIER_SELECTED" desc="Content description for the tab that is selected">
+        Selected Tab
+      </message>
+      <message name="IDS_ACCESSIBILITY_TABSTRIP_INCOGNITO_IDENTIFIER" desc="Content description for tabs that are not selected in incognito mode">
+        Incognito Tab
+      </message>
+      <message name="IDS_ACCESSIBILITY_TABSTRIP_INCOGNITO_IDENTIFIER_SELECTED" desc="Content description for the tab that is selected in incognito mode">
+        Selected Incognito Tab
+      </message>
       <message name="IDS_ACCESSIBILITY_NTP_TOOLBAR_BTN_BOOKMARKS" desc="Content description for the bookmarks tab of the new tab page.">
         Bookmarks
       </message>