Create a new print backend for the updated CUPS APIs

printing/printing.gyp

Index: printing/printing.gyp
diff --git a/printing/printing.gyp b/printing/printing.gyp
index be202cbfdb838df6337f342c91c59be37cda7058..a7a35c9034f1bd18f2c15e9c38dec8a6d00d096c 100644
--- a/printing/printing.gyp
+++ b/printing/printing.gyp
@@ -72,7 +72,6 @@
         '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',
@@ -174,10 +173,28 @@
             # of the print backend and enables a custom implementation instead.
             'PRINT_BACKEND_AVAILABLE',
           ],
-          'sources': [
-            'backend/cups_helper.cc',
-            'backend/cups_helper.h',
-            'backend/print_backend_cups.cc',
+
+          'conditions': [
+            ['chromeos==1', {
+              'sources': [
+                'backend/cups_connection.cc',
+                'backend/cups_connection.h',
+                'backend/cups_deleter.cc',
+                'backend/cups_deleter.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',
+              ],
+            }, { # chromeos==0
+              'sources': [
+                'backend/cups_helper.cc',
+                'backend/cups_helper.h',
+                'backend/print_backend_cups.cc',
+              ],
+            }],
           ],
         }],
         ['OS=="linux" and chromeos==1', {
@@ -192,6 +209,7 @@
         }],
         ['OS=="linux" and chromeos==0', {
           'sources': [
+            'printed_document_linux.cc',
             'printing_context_linux.cc',
             'printing_context_linux.h',
           ],