WebKit does this at least for lists that match in length and tags, compare http://trac.webkit.org/browser/webkit/trunk/Source/WebCore/page/animation/CSSPropertyAnimation.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/833939114f317ca1b5c53f2c832afdcd97a78d3f

commit 833939114f317ca1b5c53f2c832afdcd97a78d3f
Author: alancutter <alancutter@chromium.org>
Date: Fri May 19 17:59:24 2017

Enable interpolation of CSS property font-variation-settings

Spec: https://drafts.csswg.org/css-fonts-4/#low-level-font-variation-settings-control-the-font-variation-settings-property

BUG= 672025 

Review-Url: https://codereview.chromium.org/2891743003
Cr-Commit-Position: refs/heads/master@{#473244}

[add] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/LayoutTests/animations/composition/font-variation-settings-composition.html
[add] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/LayoutTests/animations/interpolation/font-variation-settings-interpolation.html
[modify] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/LayoutTests/animations/interpolation/resources/interpolation-test.js
[add] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/LayoutTests/animations/responsive/font-variation-settings-responsive.html
[modify] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/Source/core/animation/BUILD.gn
[add] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/Source/core/animation/CSSFontVariationSettingsInterpolationType.cpp
[add] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/Source/core/animation/CSSFontVariationSettingsInterpolationType.h
[modify] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.cpp
[add] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/Source/core/animation/animatable/AnimatableFontVariationSettings.cpp
[add] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/Source/core/animation/animatable/AnimatableFontVariationSettings.h
[modify] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/Source/core/animation/animatable/AnimatableValue.h
[modify] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/Source/core/animation/css/CSSAnimatableValueFactory.cpp
[modify] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/Source/core/css/CSSProperties.json5
[modify] https://crrev.com/833939114f317ca1b5c53f2c832afdcd97a78d3f/third_party/WebKit/Source/core/css/CSSPropertyEquality.cpp