commit 5b8fb7ccd2d4c4837d5d6d4eda7dead886d9f24a
author Shimi Zhang <ctzsm@chromium.org> Thu Sep 27 01:20:49 2018
committer Commit Bot <commit-bot@chromium.org> Thu Sep 27 01:20:49 2018
tree 4e78c85080f9ff52078ddfd3d41a28950f0980a2
parent 867eb8078068308ce3562339254727df9b011565

[Printing] Remove dependency on raw fd in PrintingContext

In PrintingContext, we rely on raw file descriptor to figure out which
PrintingContext is responsible for current task. The ultimate goal was
to figure out which PrintingController that PrintingContext is talking
to.

But since PrintingControllerImpl is a singleton, every PrintingContext
is associated with the same PrintingController. So there is no need to
use the raw file descriptor to distinguish between PrintingControllers.

This CL removes the dependency on raw fd, in preparation for fixing
double ParcelFileDescriptor closing issue (http://crrev/c/1244803).

Bug: 882608
Change-Id: Ic3b7496661c913c028a86c7c2cd5e853a98a83a2
Reviewed-on: https://chromium-review.googlesource.com/1244832
Commit-Queue: Shimi Zhang <ctzsm@chromium.org>
Reviewed-by: Changwan Ryu <changwan@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594553}