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 f22e7aa5c469a4cf34dbd68ab3f5772892a7483f..3e11bbcfd733ccc66ef38ff0fbf28c93b29e24e5 100644
--- a/chrome/browser/chromeos/BUILD.gn
+++ b/chrome/browser/chromeos/BUILD.gn
@@ -1256,6 +1256,7 @@ 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",
@@ -1498,11 +1499,13 @@ 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",
     ]
   }