How to edit/reset Chrome DevTools settings manually on disk?

Question

In Chrome 44 there is a new DevTools experiment called "Material design" (you have to enable DevTools experiments and then do the 6 shift presses).

After enabling that experiment, DevTools does not open anymore. I tried different ways of starting it (including chrome://inspect) but to no avail.
It actually does open as I can see the DevTools URL in chrome://inspect/#other

But the panel does not show up.

So I have no way to disable that particular experiments through the UI.
What I can do is to disable all DevTools experiments with chrome://flags/#enable-devtools-experiments, and after that DevTools works normally again. But then I have no way to enable the other experiments that I do want.

Is there a way to manually edit DevTools settings in some file?

Solution 1

Here are some quick steps that should work:

1. Disable experiments and open DevTools.
2. Pop DevTools out into its own window (long press the dock to bottom button and select pop out.)
3. With the DevTools window focused, inspect it (Ctrl + Shift +I).
4. Go to resources > localstorage. Then to chrome-devtools://devtools
5. Delete the experiments key.
6. Re-enable experiments.

Solution 2

1. Open dev tools with Ctrl + Shift + I.
2. Click Customize icon (three dots) on upper right.
3. Click Settings.
4. Click 'Restore defaults and reload' button on lower right corner.