ccpr: Remove constant scale when solving the cubic midtangent

We only care about the direction of the tangent vector, not the the
magnitude, so a 3x scale is irrelevant.

Bug: skia:
Change-Id: Icd2d82faf2c700fc794f8d4a59f21b32398b64f0
Reviewed-on: https://skia-review.googlesource.com/142245
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
1 file changed