GitLab

SharedContextState could be released before releasing all
WrappedSkImage backings. To avoid this problem, by holding a ref of
SharedContextState.

Bug: None
Change-Id: I2ebe99a18b939f77894ee24049b23d5e0cc6764e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2438189
Commit-Queue: Peng Huang <penghuang@chromium.org>
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811941}