Show FPS meter Chrome 33
Version 51.0.2704.63 (64-bit) Update for anyone still looking
F12
click on 3 dots
Click on More tools
Click on Rendering settings
Then the settings will be available down near the console
Go to about:flags and enable the the FPS counter there.
You might also need to enable GPU composition on all pages. I can't enable this on my current machine, so I'm afraid I can't test it myself.
See this article for more information
Found the answer in the developer tools docs.
They have moved to Timeline
Towards the bottom there is a tab called Rendering, this contains all the goodies that were once in settings.
For more info see Rendering Settings