All the Google Chrome branches can be downloaded from Softpedia
The Google Chrome developers only provide two kinds of binary files, deb and rpm, and no source. If you are not using a Linux distribution capable of reading this type of files, you will have to wait until it hits your repositories.
Usually, a complete list of changes can be found on the official website. Remember that this is a development version and it should NOT be installed on production machines. It is intended for testing purposes only.
Download Google Chrome 35.0.1916.27 Beta for Linux
Download Google Chrome 35.0.1916.27 Beta for Windows
Download Google Chrome 35.0.1916.27 Beta for Mac OS X