Update the string for offline files.

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 9affad60c73f5fff9d4bc941e740b6a51edd3eb2..eae8faa11a3e32eb9a67d6318bc64301f2398ff7 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -641,10 +641,10 @@ Press any key to continue exploring.
     You are offline
   </message>
   <message name="IDS_FILE_BROWSER_OFFLINE_MESSAGE" desc="Message informing the user how to make the selected file available offline.">
-    To save this file for offline use, get back online and&lt;br&gt;select the <ph name="OFFLINE_CHECKBOX_NAME">'$1'<ex>'Available offline'</ex></ph> checkbox for this file.
+    To save this file for offline use, get back online, right-click the file, and select the <ph name="OFFLINE_CHECKBOX_NAME">'$1'<ex>'Available offline'</ex></ph> option.
   </message>
   <message name="IDS_FILE_BROWSER_OFFLINE_MESSAGE_PLURAL" desc="Message informing the user how to make multiple selected files available offline.">
-    To save these files for offline use, get back online and&lt;br&gt;select the <ph name="OFFLINE_CHECKBOX_NAME">'$1'<ex>'Available offline'</ex></ph> checkbox for these files.
+    To save these files for offline use, get back online, right-click the files, and select the <ph name="OFFLINE_CHECKBOX_NAME">'$1'<ex>'Available offline'</ex></ph> option.
   </message>
   <message name="IDS_FILE_BROWSER_HOSTED_OFFLINE_MESSAGE" desc="Message informing the user that the selected file is only available online.">
     You must be online to access this file.