Black Dark Gmail Hangouts Chat Theme

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Black Dark Gmail Hangouts Chat Theme",
  "short_name": "Black Dark Gmail Hangouts Chat Theme",
  "description": "Black Dark Gmail Hangouts Chat Theme. Make your Gmail Chat dark!",
  "version": "0.0.3",
  "manifest_version": 2,
  "icons": {
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "*://hangouts.google.com/*"
      ],
      "css": [
        "style-gchat.css"
      ]
    }
  ]
}