chromium/chrome/test/data/extensions/api_test/content_security_policy/manifest.json

{
  "name": "content security policy tests",
  "version": "0.1",
  "manifest_version": 2,
  "description": "Sanity check that content_security_policy works for extensions. The majority of this is implemented (and tested) in WebKit, but we have a sanity test here just to make sure the integration with Chromium keeps working.",
  "background": {
    "page": "test.html"
  },
  "content_security_policy": "script-src 'self'; object-src 'none'"
}