Google Chrome is a non-free proprietary web browser based on Chromium with extra features added such as a built-in Adobe Flash reader and PDF viewer along with support for DRM. Use this tag for questions about installing and using the Google Chrome browser on Ubuntu systems.
This tag is for Google's browser, Chrome. For questions on Chromium read and use chromium.
Chrome is not available in the default Ubuntu repositories, but you can install it by using Google's PPA. Ubuntu ships Chromium, the open source project that Chrome is built from. See this for a detailed list of differences between Google Chrome and Chromium.
Since version 28, all Chromium based browsers use a forked version of Webkit, called Blink.