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Recent cleanup and performance changes caused a regression in the fullscreen
transition animation, leading to this revert.

This reverts commit 9ec18e41.
This reverts commit b62daf58.
This reverts commit 014fd0a1.

TBR=erikchen@chromium.org
BUG=470180,464754,454502
TEST=None

Review URL: https://codereview.chromium.org/1042633003

Cr-Commit-Position: refs/heads/master@{#322728}