Change UsbDeviceFilter to use const references instead of

chrome/browser/chromeos/printer_detector/legacy_printer_detector.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdint.h>
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 212 matching lines @@
  private:
   // UsbService::observer override:
   void OnDeviceAdded(scoped_refptr<device::UsbDevice> device) override {
     const user_manager::User* user =
         ProfileHelper::Get()->GetUserByProfile(profile_);
     if (!user || !user->HasGaiaAccount() || !user_manager::UserManager::Get() ||
         user != user_manager::UserManager::Get()->GetActiveUser()) {
       return;
     }
 
-    if (!UsbDeviceIsPrinter(device)) {
+    if (!UsbDeviceIsPrinter(*device)) {
       return;
     }
 
     if (notification_ui_manager_ == nullptr) {
       notification_ui_manager_ = g_browser_process->notification_ui_manager();
     }
 
     UMA_HISTOGRAM_ENUMERATION("PrinterService.PrinterServiceEvent",
                               PRINTER_ADDED, PRINTER_SERVICE_EVENT_MAX);
     ShowPrinterPluggedNotification(device);
@@ skipping 80 matching lines @@
 
 }  // namespace
 
 // static
 std::unique_ptr<PrinterDetector> PrinterDetector::CreateLegacy(
     Profile* profile) {
   return base::MakeUnique<LegacyPrinterDetectorImpl>(profile);
 }
 
 }  // namespace chromeos