Add message and Help Center link to the chooser UI

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 9a76167dcb1ddc995094dd3457c09b19169ef8df..16e2a8f92631037c16f4bb81c5669b72f751cb4b 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -14523,6 +14523,14 @@ Please check your email at <ph name="ACCOUNT_EMAIL">$2<ex>jane.doe@gmail.com</ex
       <message name="IDS_CHOOSER_BUBBLE_CANCEL_BUTTON_TEXT" desc="The text that is shown on the cancel button in the chooser popup.">
         Cancel
       </message>
+      <!-- Chooser Bubble Footnote Text -->
+      <message name="IDS_CHOOSER_BUBBLE_FOOTNOTE_TEXT" desc="This text is shown at the bottom of the chooser popup with a link to part of its text.">
+        Not seeing your device? <ph name="GET_HELP_LINK">$1<ex>Get help</ex></ph>
+      </message>
+      <!-- Chooser Bubble Get Help Link Text -->
+      <message name="IDS_CHOOSER_BUBBLE_GET_HELP_LINK_TEXT" desc="Text of the 'Get help' link at the bottom of the chooser popup.">
+        Get help
+      </message>
     </if>
 
     <if expr="is_android">