GitLab

The methods being modified are PrintJob::Initialize() and
PrintViewManagerBase::CreateNewPrintJob().

Right now they take PrinterQuery's parent class, PrintJobWorkerOwner.
However, in non-test situations, these methods always take a
PrinterQuery. So just make them to take a PrinterQuery. Once that is
done:

- PrintJobWorkerOwner no longer needs a cookie() method. Move that into
  PrinterQuery.
- A test class used for testing PrintJob now derives from PrinterQuery.
  Update the test class to let it continue working.

Change-Id: I6214fa481ac57a017111aa2a6f3e1b00c22d96c6
Reviewed-on: https://chromium-review.googlesource.com/1000965
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550809}