It is security and stability feature, not worth to combine.
Of course it is possible because Chrome is open source software and you can edit programs source code. Not so easy still.
I've been using Google Chrome for quite some years now. As more extensions come into the already vast extension gallery of Google Chrome, I've installed some also. Now I experience slowdown of the overall performance of my computer. Is it possible to combine all the (chrome.exe) processes into one single one in Task Manager? If so, how?