Initial CL for Data Saver (Flywheel) prompt when cellular network detected

chrome/app/chromeos_strings.grdp

Index: chrome/app/chromeos_strings.grdp
diff --git a/chrome/app/chromeos_strings.grdp b/chrome/app/chromeos_strings.grdp
index 922abf02084925c3d9ad7149a40b4470b6e197b0..de7b0f3306dda55dfec5b5a5400c0963d2ec4701 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -5648,6 +5648,12 @@ All users must sign out to continue.
   <message name="IDS_3G_NOTIFICATION_MESSAGE" desc="Text of the 3G data notification telling that 3G data is enabled.">
     Google Chrome will use mobile data if you're not connected to another network.
   </message>
+  <message name="IDS_3G_DATASAVER_TITLE" desc="Title of the 3G data notification prompting user to install Data Saver.">
+    You are using mobile data
+  </message>
+  <message name="IDS_3G_DATASAVER_MESSAGE" desc="Text of the 3G data notification prompting user to install Data Saver.">
+    Save data and browse faster using Google Data Saver. Click to learn more.
+  </message>
 
   <!-- chrome://mobilesetup strings -->
   <message name="IDS_MOBILE_SETUP_TITLE" desc="ChromeOS mobile device activation page title">