Remove the legacy (extension-notifier) usb printer detector. Rename the remaining printerdetector …

chrome/browser/chromeos/printer_detector/usb_printer_detector.h

Index: chrome/browser/chromeos/printer_detector/usb_printer_detector.h
diff --git a/chrome/browser/chromeos/printer_detector/usb_printer_detector.h b/chrome/browser/chromeos/printer_detector/usb_printer_detector.h
new file mode 100644
index 0000000000000000000000000000000000000000..b7e7ad50f5e63f6efb0944475bf4756788175e3b
--- /dev/null
+++ b/chrome/browser/chromeos/printer_detector/usb_printer_detector.h
@@ -0,0 +1,53 @@
+// 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_PRINTER_DETECTOR_USB_PRINTER_DETECTOR_H_
+#define CHROME_BROWSER_CHROMEOS_PRINTER_DETECTOR_USB_PRINTER_DETECTOR_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "base/macros.h"
+#include "chromeos/printing/printer_configuration.h"
+#include "components/keyed_service/core/keyed_service.h"
+
+class Profile;
+
+namespace chromeos {
+
+// Observes device::UsbService for addition of USB printers (devices with
+// interface class 7).  When a device is detected, it is forwarded to the
+// printing subsystem for either autoconfiguration or user guidance.
+class UsbPrinterDetector : public KeyedService {
+ public:
+  class Observer {
+   public:
+    virtual ~Observer() = default;
+
+    // The set of available printers has changed.
+    virtual void OnAvailableUsbPrintersChanged(
+        const std::vector<Printer>& printers) = 0;
+  };
+
+  // Factory function for the CUPS implementation.
+  static std::unique_ptr<UsbPrinterDetector> Create(Profile* profile);
+  ~UsbPrinterDetector() override = default;
+
+  virtual void AddObserver(Observer* observer) = 0;
+  virtual void RemoveObserver(Observer* observer) = 0;
+
+  // Get the current set of detected printers.
+  virtual std::vector<Printer> GetPrinters() = 0;
+
+ protected:
+  UsbPrinterDetector() = default;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(UsbPrinterDetector);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_PRINTER_DETECTOR_USB_PRINTER_DETECTOR_H_