Blink is the browser engine used by Chromium. It is located in src/third_party/blink.
See also the Blink page on chromium.org.
Blink follows content guidelines: only code that implements web platform features should live in Blink.
common/: code that can run in the browser process or renderer process.public/: the Blink Public API, used primarily by the content module.renderer/: code that runs in the renderer process (most of Blink).web_tests/: integration tests called “web tests”.