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

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>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/scoped_observer.h"
 #include "base/strings/string_number_conversions.h"
 #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"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/ui/browser_navigator.h"
 #include "chrome/common/extensions/api/webstore_widget_private.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/grit/generated_resources.h"
 #include "chrome/grit/theme_resources.h"
 #include "components/user_manager/user.h"
@@ skipping 21 matching lines @@
 
 namespace chromeos {
 namespace {
 
 const char kPrinterProviderFoundNotificationID[] =
     "chrome://settings/printer/printer_app_found";
 
 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,
   NOTIFICATION_SHOWN_PRINTER_SUPPORTED,
   NOTIFICATION_SHOWN_PRINTER_NOT_SUPPORTED,
   WEBSTORE_WIDGET_APP_LAUNCHED,
   PRINTER_SERVICE_EVENT_MAX,
 };
 
 base::string16 GetNotificationTitle(uint16_t vendor_id, uint16_t product_id) {
@@ skipping 151 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;
     }
 
-    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();
     }
 
     UMA_HISTOGRAM_ENUMERATION("PrinterService.PrinterServiceEvent",
                               PRINTER_ADDED, PRINTER_SERVICE_EVENT_MAX);
     ShowPrinterPluggedNotification(device);
   }
 
@@ skipping 78 matching lines @@
 
 }  // namespace
 
 // static
 std::unique_ptr<PrinterDetector> PrinterDetector::CreateLegacy(
     Profile* profile) {
   return base::MakeUnique<LegacyPrinterDetectorImpl>(profile);
 }
 
 }  // namespace chromeos