commit 90832f4a196820a9ff74e7464286330bbd255b69
author alancutter <alancutter@chromium.org> Mon May 29 04:54:18 2017
committer Commit bot <commit-bot@chromium.org> Mon May 29 04:54:18 2017
tree 822152910f6b553c957727d337f11805d74e26c1
parent 3ecac93803273c7b0fccd67e575f4f5101bfea5b

Make InterpolationEnvironment virutal

This change refactors InterpolationEnvironment to be virtual and splits
its members between two subclasses, one for CSS and one for SVG.
This gives us better separation between the two environments and provides
better type checking to make sure the appropriate data member is being
accessed for the context.

This patch introduces no changes in behaviour.

BUG=671904

Review-Url: https://codereview.chromium.org/2811253003
Cr-Commit-Position: refs/heads/master@{#475288}