Avoid last param to CTFontCreateWithGraphicsFont.

The last parameter of CTFontCreateWithGraphicsFont (CTFontDescriptorRef
attributes) *must* be nullptr. If non-nullptr then with fonts with
variation axes, the copy will fail in CGFontVariationFromDictCallback
when it assumes kCGFontVariationAxisName is CFNumberRef which it quite
obviously is not.

Blocking dev builds, just removes code.

Review URL: https://codereview.chromium.org/1362053003

Cherry-pick: 0584631f5254add2f85d94f788d9d6115509211e
Approval: https://crbug.com/524646#c34
1 file changed