chromium/chrome/test/data/extensions/api_test/canvas_2d/manifest.json

{
  "description": "Extension which has just a background page with 2D canvas",
  "name": "background_page_2d_canvas",
  "background": {
    "page": "background.html"
  },
  "version": "0.1",
  "manifest_version": 2
}