Add a method to query IPP printers for attributes.

chrome/browser/chromeos/BUILD.gn

Index: chrome/browser/chromeos/BUILD.gn
diff --git a/chrome/browser/chromeos/BUILD.gn b/chrome/browser/chromeos/BUILD.gn
index acfe0271e4106999e336d952c05ebf8d84bfa567..84834d2f4d4b6b8a5d7319982fe4af502c03d77a 100644
--- a/chrome/browser/chromeos/BUILD.gn
+++ b/chrome/browser/chromeos/BUILD.gn
@@ -1259,6 +1259,7 @@ source_set("chromeos") {
     "printing/printer_configurer.h",
     "printing/printer_discoverer.cc",
     "printing/printer_discoverer.h",
+    "printing/printer_info.h",
     "printing/printers_manager.cc",
     "printing/printers_manager.h",
     "printing/printers_manager_factory.cc",
@@ -1499,11 +1500,13 @@ source_set("chromeos") {
     sources += [
       "printing/cups_print_job_manager_impl.cc",
       "printing/cups_print_job_manager_impl.h",
+      "printing/printer_info_cups.cc",
     ]
   } else {
     sources += [
       "printing/fake_cups_print_job_manager.cc",
       "printing/fake_cups_print_job_manager.h",
+      "printing/printer_info_stub.cc",
     ]
   }