GitLab

With PPCompletionCallbackFromResultCallback() wraps base::OnceCallback
as a pp::CompletionCallback, direct references to
pp::CompletionCallbackFactory in pdf/ now can be removed.

Bug: 1101169
Change-Id: If8249b1d995221f9f7fb765dee8509368c7a21bb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2347978
Commit-Queue: Hui Yingst <nigi@chromium.org>
Reviewed-by: K. Moon <kmoon@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797915}