chromium/chrome/test/data/extensions/api_test/tts_engine/engine_error/manifest.json

{
  "name": "chrome.ttsEngine",
  "version": "0.1",
  "manifest_version": 2,
  "description": "browser test for chrome.ttsEngine API",
  "background": {
    "scripts": ["test.js"],
    "persistent": true
  },
  "tts_engine": {
    "voices": [
      {
        "voice_name": "Zach",
        "lang": "en-US",
        "event_types": [ "end", "error" ]
      }
    ]
  },
  "permissions": ["tts", "ttsEngine"]
}