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 13ad875ff9b04ee3f15cf06f875751a2de854c8d..f1114e501cb1701413d2d44ed69a6956108cb358 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 on this computer, which limits the capabilities of this extension. However, other devices may not support this flag or have it enabled. On these devices, 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>