GitLab

- In ElementAnimations::UpdateClientAnimationState(), only get animation
  scales when there is transform animation. This fixes the main reason
  of the regression caused by crrev.com/c/1547131.

- Combine HasOnlyTranslationTransforms(), AnimationStartScale() and
  MaximumTargetScale() of KeyframeEffect into one function to avoid
  duplicated code/executation when called separately from one place.

- Remove unused HasOnlyTranslationTransforms() from AnimationHost
  and ElementAnimations.

Bug: 951912
Change-Id: I5cc858fb012f0b7c0280b9935d84bc2aa4cf4d7c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1580551
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654647}