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 46533e4ec9daa5adcc318447b0a1d72ae3faee1e..026da23f5bcdb87cd3d8237e361ba45ee148e45a 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",
@@ -181,6 +180,8 @@ component("printing") {
         "backend/cups_printer.h",
         "backend/print_backend_cups_ipp.cc",
         "backend/print_backend_cups_ipp.h",
+        "printing_context_chromeos.cc",
+        "printing_context_chromeos.h",
       ]
     } else {
       sources += [
@@ -197,11 +198,13 @@ component("printing") {
 
     sources += [
       "backend/print_backend_chromeos.cc",
+      "printed_document_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",
     ]