Yep, Chrome itself is not open source:
License: Freeware under Google Chrome Terms of Service
Chrome's WebKit & Blink layout engines and its V8 JavaScript engine are each free and open-source software, while its other components are each either open-source or proprietary. However, section 9 of Google Chrome's Terms of Service designates the whole package - Chrome itself - as proprietary freeware.
I coped it from https://code.google.com/p/v8/...
> Google Chrome, the open source browser from Google.
Google Chrome is proprietary software. Chromium is open source.