Add accounts.youtube.com in content_security_policy in manifest.json.

This fixes a login hang with content security policy error output.

BUG=168525
TEST=manually login on Chrome OS.


Review URL: https://chromiumcodereview.appspot.com/11778017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@175466 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/gaia_auth/manifest.json

@@ -4,7 +4,7 @@
   "name": "GaiaAuthExtension",
   "version": "0.0.1",
   "manifest_version": 2,
-  "content_security_policy": "default-src 'self'; script-src 'self'; frame-src 'self' https://accounts.google.com; style-src 'self' 'unsafe-inline'",
+  "content_security_policy": "default-src 'self'; script-src 'self'; frame-src 'self' https://accounts.google.com https://accounts.youtube.com; style-src 'self' 'unsafe-inline'",
   "description": "GAIA Component Extension",
   "web_accessible_resources": [
     "main.css",