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 430376412f23a82413293fec4cdf86317c23f71b..b1d89a041e5b43886dc08868d9e48c3ac1c38512 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -14563,6 +14563,14 @@ 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 No Option Text -->
+      <message name="IDS_CHOOSER_BUBBLE_NO_OPTION_TEXT" desc="This text is shown at the bottom of the chooser popup with a link to part of its text.">
+        Not seeing your <ph name="OPTION_DESCRIPTION">$1<ex>device</ex></ph>? <ph name="GET_HELP_LINK">$2<ex>Get help</ex></ph>

[Jeffrey Yasskin, 2016/02/19 21:25:40]

Translation doesn't work like this either. Some languages require, for example,
a different form of 'your' depending on what word fills in 'device'. You have to
translate at least whole sentences at a time, and ideally whole concepts.

[juncai, 2016/02/20 02:25:05]

Done.

+      </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">