Interpolation for Scale and Translate according to CommitStyles

This change updates the Blend operation for scale and translate
transforms, along with CSSFunctionValue calculations for the respective
transforms.

A new Args property is introduced to TransformOperation that keeps track
of how many arguments the primitive scale() and translate() should
have during interpolation.

Follow-up work will include rotate as well as computedStyleMap.

Bug: 1181086
Change-Id: I74c54f47feec66ed5247699543afd1776be8fdcd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3163382
Reviewed-by: David Baron <[email protected]>
Reviewed-by: Philip Rogers <[email protected]>
Reviewed-by: Anders Hartvoll Ruud <[email protected]>
Reviewed-by: Olga Gerchikov <[email protected]>
Commit-Queue: Sahir Vellani <[email protected]>
Cr-Commit-Position: refs/heads/main@{#927299}

Author: sahirv

css/css-transforms/animation/transform-interpolation-computed-value.html

@@ -53,7 +53,9 @@
 interpolation_test('translateZ(-50px)','translateZ(50px)', 'translateZ(0px)');
 interpolation_test('translate(0%)', 'translate(50%)', 'translate(25%)');
 interpolation_test('translate(50%)', 'translate(100%, 50%)', 'translate(75%, 25%)');
+interpolation_test('translate(0%, 50%)', 'translate(50%, 100%)', 'translate(25%, 75%)');
 interpolation_test('translate3d(0,0,-50px)','translateZ(50px)', 'translate3d(0px, 0px, 0px)');
+interpolation_test('translate(50px, 0px)', 'translate(100px, 0px)', 'translate(75px)')
 
 interpolation_test('rotate(30deg)', 'rotate(90deg)', 'rotate(60deg)');
 interpolation_test('rotateZ(30deg)', 'rotateZ(90deg)', 'rotateZ(60deg)');