Fix grammar on off-store install error.

BUG=139773


Review URL: https://chromiumcodereview.appspot.com/10855186

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151834 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/generated_resources.grd

@@ -4583,7 +4583,7 @@ Update checks have repeatedly failed for the extension "<ph name="EXTENSION_NAME
         Expected ID "<ph name="EXPECTED_ID">$1<ex>bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb</ex></ph>", but ID was "<ph name="NEW_ID">$2<ex>aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa</ex></ph>".
       </message>
       <message name="IDS_EXTENSION_INSTALL_DISALLOWED_ON_SITE" desc="Error displayed during installation of an extension when installation is not allowed from the current site.">
-        Extensions, apps, and user scripts can only be added from the Chrome Web Store.
+        Apps, extensions, and user scripts cannot be added from this website.
       </message>
       <message name="IDS_EXTENSION_INSTALL_UNEXPECTED_VERSION" desc="Error displayed during installation of a side-loaded app, extension, or theme when the version of the referenced extension does not match the version the developer declared during registration.">
         Expected version "<ph name="EXPECTED_VERSION">$1<ex>2.0</ex></ph>", but version was "<ph name="NEW_ID">$2<ex>1.0</ex></ph>".