Update extension install prompt to reflect withheld permissions

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 df0beb4d7de86c9a6c578194377c43f6284f9b51..5c8705f39c792682a5d9ecb90fecf4f96bef21ba 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -4186,6 +4186,9 @@ Make sure you do not expose any sensitive information.
       <message name="IDS_EXTENSION_PROMPT_CAN_ACCESS" desc="Second line in the content area of the extension or app permissions view dialog. Note that the exact wording is important. This should mean that the extension _can now_ access the listed privileges, because it has already been installed. This message appeared because the user must approve new permissions of the extension or app.">
         It can:
       </message>
+      <message name="IDS_EXTENSION_PROMPT_WITHHELD" desc="Header for withheld permissions warning on extension install.">
+        Warning: You've enabled the --scripts-require-action flag which limits the capabilities on this computer. However, other devices may not support this flag or have it enabled. On these computers, this extension can also:
+      </message>
       <message name="IDS_EXTENSION_NO_SPECIAL_PERMISSIONS" desc="Shown when the app/extension requires no special permission">
         Has no special permissions.
       </message>