Print directly to CUPS using the IPP APIs

printing/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/config/sysroot.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 if (is_mac) {
   import("//build/config/mac/mac_sdk.gni")
@@ skipping 40 matching lines @@
     "print_settings.cc",
     "print_settings.h",
     "print_settings_conversion.cc",
     "print_settings_conversion.h",
     "print_settings_initializer_mac.cc",
     "print_settings_initializer_mac.h",
     "print_settings_initializer_win.cc",
     "print_settings_initializer_win.h",
     "printed_document.cc",
     "printed_document.h",
-    "printed_document_linux.cc",
     "printed_document_mac.cc",
     "printed_document_win.cc",
     "printed_page.cc",
     "printed_page.h",
     "printed_pages_source.h",
     "printing_context.cc",
     "printing_context.h",
     "printing_utils.cc",
     "printing_utils.h",
     "units.cc",
@@ skipping 100 matching lines @@
     if (is_chromeos) {
       sources += [
         "backend/cups_connection.cc",
         "backend/cups_connection.h",
         "backend/cups_ipp_util.cc",
         "backend/cups_ipp_util.h",
         "backend/cups_printer.cc",
         "backend/cups_printer.h",
         "backend/print_backend_cups_ipp.cc",
         "backend/print_backend_cups_ipp.h",
+        "printed_document_chromeos.cc",
+        "printing_context_chromeos.cc",
+        "printing_context_chromeos.h",
       ]
     } else {
       sources += [
         "backend/cups_helper.cc",
         "backend/cups_helper.h",
         "backend/print_backend_cups.cc",
         "backend/print_backend_cups.h",
       ]
     }
   }
 
   if (is_chromeos) {
     defines += [ "PRINT_BACKEND_AVAILABLE" ]
 
     sources += [
       "backend/print_backend_chromeos.cc",
       "printing_context_no_system_dialog.cc",
       "printing_context_no_system_dialog.h",
     ]
   } else if (is_linux) {  # Non-ChromeOS Linux.
     sources += [
+      "printed_document_linux.cc",
       "printing_context_linux.cc",
       "printing_context_linux.h",
     ]
   }
 
   if (is_android) {
     sources += [
       "printing_context_android.cc",
       "printing_context_android.h",
     ]
@@ skipping 87 matching lines @@
       "android/java/src/org/chromium/printing/PrintManagerDelegate.java",
       "android/java/src/org/chromium/printing/PrintManagerDelegateImpl.java",
       "android/java/src/org/chromium/printing/Printable.java",
       "android/java/src/org/chromium/printing/PrintingContext.java",
       "android/java/src/org/chromium/printing/PrintingContextInterface.java",
       "android/java/src/org/chromium/printing/PrintingController.java",
       "android/java/src/org/chromium/printing/PrintingControllerImpl.java",
     ]
   }
 }