commit 1f05e0767786c4b551c6cd3846dce6c183500747
author nainar <nainar@chromium.org> Wed May 17 23:55:27 2017
committer Commit bot <commit-bot@chromium.org> Wed May 17 23:55:27 2017
tree 2bd3c8d7f84abbbffe0577d055035c212b427ab7
parent 7fa1d036e427d6a1fca97f8d954835d8d7220986

Generate diffs for fields in ComputedStyle that use their public getters

This patch allows us to diff fields using their public getters when
these getters do added work.

We specify the getters in a map of expressions in
ComputedStyleDiffFunctions.json5.

This can be used to diff not just public getter but any function that
uses the field. Hence the name map_of_expressions.

Diff: https://gist.github.com/ae54c525ef49c24b7707848546e78c73/revisions

BUG=710938

Review-Url: https://codereview.chromium.org/2876803003
Cr-Commit-Position: refs/heads/master@{#472605}