Present the printer list from preferences for Chrome OS.

printing/backend/print_backend.h

Index: printing/backend/print_backend.h
diff --git a/printing/backend/print_backend.h b/printing/backend/print_backend.h
index 46b0801323db12cec7751f5108d54adb99f00100..079b1506de47c51591caea6ee692dc70333da42a 100644
--- a/printing/backend/print_backend.h
+++ b/printing/backend/print_backend.h
@@ -22,7 +22,8 @@ class DictionaryValue;
 namespace printing {
 
 // Note: There are raw values. The |printer_name| and |printer_description|
-// require further interpretation on Mac. See existing callers for examples.
+// require further interpretation on Mac and Chrome OS. See existing callers for
+// examples.
 struct PRINTING_EXPORT PrinterBasicInfo {
   PrinterBasicInfo();
   PrinterBasicInfo(const PrinterBasicInfo& other);