Implement basic USB setup in the cups printer detector. Factor out

chrome/browser/chromeos/printer_detector/legacy_printer_detector.cc

Index: chrome/browser/chromeos/printer_detector/legacy_printer_detector.cc
diff --git a/chrome/browser/chromeos/printer_detector/legacy_printer_detector.cc b/chrome/browser/chromeos/printer_detector/legacy_printer_detector.cc
index c2b1c2a188da36c42860f979d1e207d3280f7a58..50e3c852f0f7dffefea179663adb1a7b3cb51438 100644
--- a/chrome/browser/chromeos/printer_detector/legacy_printer_detector.cc
+++ b/chrome/browser/chromeos/printer_detector/legacy_printer_detector.cc
@@ -17,6 +17,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/printer_detector/printer_detector.h"
+#include "chrome/browser/chromeos/printing/usb_util.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/notifications/notification.h"
 #include "chrome/browser/notifications/notification_delegate.h"
@@ -58,10 +59,6 @@ const char kPrinterProviderFoundNotificationID[] =
 const char kNoPrinterProviderNotificationID[] =
     "chrome://settings/printer/no_printer_app";
 
-// Base class used for printer USB interfaces
-// (https://www.usb.org/developers/defined_class).
-const uint8_t kPrinterInterfaceClass = 7;
-
 enum PrinterServiceEvent {
   PRINTER_ADDED,
   DEPRECATED_PAGE_DISPLAYED,
@@ -233,10 +230,9 @@ class LegacyPrinterDetectorImpl : public PrinterDetector,
       return;
     }
 
-    device::UsbDeviceFilter printer_filter;
-    printer_filter.interface_class = kPrinterInterfaceClass;
-    if (!printer_filter.Matches(device))
+    if (!UsbDeviceIsPrinter(device)) {
       return;
+    }
 
     if (notification_ui_manager_ == nullptr) {
       notification_ui_manager_ = g_browser_process->notification_ui_manager();