Unknown options in extension manifest file are silently ignored

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 b3c0b17197f5bc9d70e7878f951797a89f97acf7..f805824770588af468cfce0f7c0a5f72b6252e54 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -4535,7 +4535,7 @@ Update checks have repeatedly failed for the extension "<ph name="EXTENSION_NAME
       <message name="IDS_EXTENSIONS_INSPECT_VIEWS" desc="The text for the label in front of the links to inspect views (some of which may not be loaded yet).">
         Inspect views:
       </message>
-      <message name="IDS_EXTENSIONS_INSTALL_WARNINGS" desc="The text which says that an extension has warnings when it was installed..">
+      <message name="IDS_EXTENSIONS_INSTALL_WARNINGS" desc="The text which says that an extension has warnings when it was installed.">
         There were warnings when trying to install this extension:
       </message>
       <message name="IDS_EXTENSIONS_ENABLE" desc="The link for enabling extensions.">