There are command line flags (or "switches") that Chromium (and Chrome) accept in order to enable particular features or modify otherwise default functionality.
Current switches may be found at http://peter.sh/examples/?/chromium-switches.html
It is important to note that using these switches is not supported or recommended. They should only be used for temporary cases and may break in the future.
To use a command line switch:
V8 can take a number of flags as well, via Chrome's
chrome.exe --js-flags="--trace-opt --trace-deopt --trace-bailout"
To get a listing of all possible V8 flags:
Browse the V8 wiki for more flags for V8.
You can change these like so:
Remember to quit the app completely and restart for flags to take effect.