The feature was implemented in the Chrome Canary experimental channel and can be easily enabled by opening the Google Chrome web browser and accessing the chrome://flags/#sys-internals flag. There you’ll be able to monitor your Chromebook’s hardware and see what’s eating your memory or CPU during heavy workloads, all in real-time. Like with all the other experimental features, the new internal page for monitoring your Chromebook’s hardware will soon be available to users on the Chrome OS stable channel, but not until it passes all the tests. So if you want to use this feature right now, you’ll have to install Chrome Canary. Otherwise you need to wait a few weeks for it to hit stable.