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..4dc32554b3dd8ca79b997b2d4b19a3350fde61b9 100644
--- a/printing/backend/print_backend.h
+++ b/printing/backend/print_backend.h
@@ -28,6 +28,7 @@ struct PRINTING_EXPORT PrinterBasicInfo {
   PrinterBasicInfo(const PrinterBasicInfo& other);
   ~PrinterBasicInfo();
 
+  std::string printer_id;

[Lei Zhang, 2016/10/28 21:55:51]

Is this field going to be ChromeOS only?

[skau, 2016/11/02 22:00:03]

I've added a guard for now.  It's probably useful in removing this nice bit of
code
https://cs.chromium.org/chromium/src/chrome/browser/ui/webui/print_preview/pr...
but I'm not 100% sure what it does so I don't want to migrate it right now.

[Lei Zhang, 2016/11/02 22:40:59]

Ok, so in patch set 2 you had [printer_id, printer_name, printer_description]
and in patch set 4 its now [printer_display_name, printer_name,
printer_description]. What was wrong with the way you had it in patch set 2?

[skau, 2016/11/02 23:38:16]

Sorry about the thrashing.  display_name is more consistent with how the field
is being used in the other platforms.  In patch set 2, I thought printer_name
was used to represent the display name rather than the name in CUPS.

   std::string printer_name;
   std::string printer_description;
   int printer_status;