chromium/chrome/test/data/extensions/wasm_app/manifest.json

{
  "name": "Hello, WebAssembly!",
  "description": "Verify that we can use WebAssembly in Chrome Apps.",
  "version": "0.1",
  "manifest_version": 2,
  "app": {
    "background": {
      "scripts": ["background.js"]
    }
  }
}