This is a generated CL by a clang refactoring tool at //tools/clang/base_bind_rewriters.
The tool rewrites base::Bind to base::BindOnce where the resulting Callback
is immediately converted to OnceCallback.
E.g.:
  base::PostTask(FROM_HERE, base::Bind(&Foo));
is rewritten to:
  base::PostTask(FROM_HERE, base::BindOnce(&Foo));

In terms of the behavior change after the rewrite, the OnceCallback
implementation moves out the bound argument to the target function, unlike
Callback.

BUG=554299

Review-Url: https://codereview.chromium.org/2828663002
Cr-Commit-Position: refs/heads/master@{#466030}