AW: disable VariationsLayers for WebView This is known to put WebView into a bad state from which it cannot recover. Delete this code as a mitigation. Bug: 1191169 Test: locally installed this and it correctly ignores the bad seed (no crash) Change-Id: I744cd558cb7d160d784e3cbc0f1826e6b1535571 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2780354 Reviewed-by: Ilya Sherman