Add more background js file and remove Google Analytics setup.

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 30e4a7b747a83e69c2b2511e2e57c3974d60e880..7f6369479ee3e65081fe8a1f48360d245e25700a 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -1053,7 +1053,7 @@ Press any key to continue exploring.
 
   <!-- Chrome OS Strings -->
   <message name="IDS_ECHO_CONSENT_DIALOG_TEXT" desc="Dialog text shown when user is asked to give consent to proceed with redeeming ECHO offer.">
-    <ph name="SERVICE_NAME">$1<ex>Google Drive</ex></ph> wants to verify that you are using an eligible Chrome OS device. <ph name="MORE_INFO_LINK">$2<ex>More info</ex></ph>
+    <ph name="SERVICE_NAME">$1<ex>Google Drive</ex></ph> wants to check if your Chrome OS device is eligible for an offer. <ph name="MORE_INFO_LINK">$2<ex>More info</ex></ph>
   </message>
   <message name="IDS_ECHO_DISABLED_CONSENT_DIALOG_TEXT" desc="Dialog text shown when user is informed that redeeming offers is disabled for the device.">
     Your IT administrator has disabled Chrome Goodies for your device. <ph name="MORE_INFO_LINK">$1<ex>More info</ex></ph>