Implement the auto-logout on idle feature for Kiosk mode.

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 e0641b50b1e6fd4d25855fa9ae49bbe2ab4e6b40..ecccccefac30e6ce785bc0caf9da04429678c953 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -11725,6 +11725,21 @@ Some features may be unavailable.  Please check that the profile exists and you
       <ph name="DATE">$1<ex>Aug 16, 2010</ex></ph>
     </message>
 
+    <!-- Idle Logout Dialog Strings -->
+    <if expr="pp_ifdef('chromeos')">
+      <message name="IDS_IDLE_LOGOUT_TITLE" desc="Dialog title for the idle logout dialog">
+        Are you still there?
+      </message>
+      <message name="IDS_IDLE_LOGOUT_WARNING" desc="Warning for the idle logout dialog">
+        This Chromebook is now idle and the current user will be logged out.
+        Press any key or move the pointer to continue exploring.
+        <ph name="LINE_BREAK">&lt;br&gt;&lt;br&gt;</ph>
+        <ph name="BEGIN_BOLD">&lt;strong&gt;</ph>
+        Restarting in: <ph name="END_BOLD">&lt;/strong&gt;</ph>
+        <ph name="TIME_LEFT">$1<ex>20</ex></ph> seconds.
+      </message>
+    </if>
+
     <!-- Imageburn Strings -->
     <if expr="pp_ifdef('chromeos')">
       <message name="IDS_CHECKING_FOR_UPDATES" desc="Notification for checking for update">