Register and select printer on click.

chrome/browser/chromeos/printing/printer_pref_manager.h

Index: chrome/browser/chromeos/printing/printer_pref_manager.h
diff --git a/chrome/browser/chromeos/printing/printer_pref_manager.h b/chrome/browser/chromeos/printing/printer_pref_manager.h
index 710616d12e0ade55fb2c4f7be2bbe2bf147783c2..69cb923152b20b8a40ae719499d2c5f3609caa96 100644
--- a/chrome/browser/chromeos/printing/printer_pref_manager.h
+++ b/chrome/browser/chromeos/printing/printer_pref_manager.h
@@ -31,6 +31,9 @@ class PrinterPrefManager : public KeyedService {
   // Returns the printers that are saved in preferences.
   std::vector<std::unique_ptr<Printer>> GetPrinters() const;
 
+  // Returns the printer with id |printer_id|.
+  std::unique_ptr<Printer> GetPrinter(const std::string& printer_id) const;
+
   // Adds or updates a printer. Printers are identified by the id field.  Use an
   // empty id to add a new printer.
   void RegisterPrinter(std::unique_ptr<Printer> printer);