MatProgressSpinner diameter input not working on older browsers

[extroniks]

Bug, feature request, or proposal:

[x] Bug

What is the expected behavior?

Setting the diameter input property changes the size of the spinner.

What is the current behavior?

Type error "Not enough arguments to CSSStyleSheet.insertRule." happens.

What are the steps to reproduce?

Plnkr example:

http://plnkr.co/edit/SrTKKv8wRSJARumOhXVW?p=preview

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

OS: Ubuntu 16.04
Browser: Firefox 54.0 (64-bit)

package-lock.json:
angular/core: 4.4.6
angular/material: github:angular/material2-builds#ee47c9dde6a42f4db60e0d762f74d3d8ce6f6c28
typescript: 2.3.4

Is there anything else we should know?

Tested with also:
<mat-spinner diameter="40"></mat-spinner>

Same behaviour.
https://developer.mozilla.org/en-US/docs/Web/API/CSSStyleSheet/insertRule
Suggested fix:
Support older browsers by adding the index of 0 to the call
stylesheet.insertRule(rule[, index])

[crisbeto]

Should be sorted out by #7810.

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