GitLab

See the bug.

I was told that one of the pieces of code that could cause jank is the callback invoked in IO thread once the read on a socket is complete. I'm not familiar with the code, and I instrumented places that look relevant; feel free to suggest adding or removing the instrumentation.

BUG=418183
TBR=asanka@chromium.org

Review URL: https://codereview.chromium.org/637733002

Cr-Commit-Position: refs/heads/master@{#299176}