Print directly to CUPS using the IPP APIs

printing/BUILD.gn

Index: printing/BUILD.gn
diff --git a/printing/BUILD.gn b/printing/BUILD.gn
index 8727eeb194ef093affbe78559b13f2be4eb1a41f..9cf5fd3451a35f9cf810e6288740b1905dabd518 100644
--- a/printing/BUILD.gn
+++ b/printing/BUILD.gn
@@ -58,7 +58,6 @@ component("printing") {
     "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",
@@ -179,6 +178,9 @@ component("printing") {
         "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 += [
@@ -200,6 +202,7 @@ component("printing") {
     ]
   } else if (is_linux) {  # Non-ChromeOS Linux.
     sources += [
+      "printed_document_linux.cc",
       "printing_context_linux.cc",
       "printing_context_linux.h",
     ]