Replace PrintingContext::Result with mojom::ResultCode

Pushing document printing to out-of-process means that there could now
be a new possible access-denied result for PrintingContext operations.
While the PrintingResult enum could be extended to include this, it
can instead just use the same mojom::ResultCode that is used for other
operations which interact with OS APIs since they would have the same
effective enum values.

In preparation for adding access-denied support to PrintingContext,
first replace all usage of PrintingContext::Result with
mojom::ResultCode.  There is no logical change with this replacement.

Bug: 809738
Change-Id: I997d4d207232142dbd36e59e3689ec71bb15fed9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3171346
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Commit-Queue: Alan Screen <awscreen@chromium.org>
Cr-Commit-Position: refs/heads/main@{#923261}

• chrome/browser/printing/print_browsertest.cc[diff]
• chrome/browser/printing/print_job_unittest.cc[diff]
• chrome/browser/printing/print_job_worker.cc[diff]
• chrome/browser/printing/print_job_worker.h[diff]
• chrome/browser/printing/print_view_manager_base.cc[diff]
• chrome/browser/printing/printer_query.cc[diff]
• chrome/browser/printing/printer_query.h[diff]
• chrome/browser/printing/test_printer_query.cc[diff]
• chrome/browser/ui/webui/print_preview/pdf_printer_handler.cc[diff]
• chrome/services/printing/print_backend_service_impl.cc[diff]
• content/browser/renderer_host/pepper/pepper_print_settings_manager.cc[diff]
• printing/BUILD.gn[diff]
• printing/emf_win_unittest.cc[diff]
• printing/printed_document_android.cc[diff]
• printing/printed_document_chromeos.cc[diff]
• printing/printed_document_linux.cc[diff]
• printing/printed_document_mac.cc[diff]
• printing/printed_document_win.cc[diff]
• printing/printing_context.cc[diff]
• printing/printing_context.h[diff]
• printing/printing_context_android.cc[diff]
• printing/printing_context_android.h[diff]
• printing/printing_context_chromeos.cc[diff]
• printing/printing_context_chromeos.h[diff]
• printing/printing_context_linux.cc[diff]
• printing/printing_context_linux.h[diff]
• printing/printing_context_mac.h[diff]
• printing/printing_context_mac.mm[diff]
• printing/printing_context_no_system_dialog.cc[diff]
• printing/printing_context_no_system_dialog.h[diff]
• printing/printing_context_system_dialog_win.cc[diff]
• printing/printing_context_system_dialog_win.h[diff]
• printing/printing_context_win.cc[diff]
• printing/printing_context_win.h[diff]
• printing/printing_context_win_unittest.cc[diff]
• printing/test_printing_context.cc[diff]
• printing/test_printing_context.h[diff]
• ui/gtk/printing/print_dialog_gtk.cc[diff]