Shatter and % crit buffs (Question)

I am trying to find out what my crit chance is and I came across something that confused me concerning shatter. I apologize if this was already answered somewhere, I couldn't find anything on it in the stickies.

Here is my question:
When shatter recalculates crit chance, does it take crit increase buffs before hand, or after?
As an example:
Glyph of Pyroblast has 5% increase chance for pyroblast to crit.

So, say I freeze my target and cast a pyro at it, with a base of 10% crit chance to make calculation easy.

Will the crit chance be 10 * 3 for the shatter, + 5 for the glyph, making it a total of 35% crit chance on that specific pyroblast cast?

Or will the crit chance be 10 + 5 for the glyph, then 15 * 3 for the shatter, making it a 45% crit chance?

Thank you in advance for the help
To put it simply, it is just 3x whatever your current crit is. For instance let's say you start out with 20% crit and have the 5% crit glyph on frostbolt/pyro, etc. It is 25% x 3, not 20% x 3 + 5.

And in regard to buffs it is the same thing. If you have 20% then get leader of the pack and focus magic, it is 28% x 3. Not 20% x 3 + 8