Move string descriptor getters from UsbDeviceHandle to UsbDevice.

device/usb/usb_device.h

 // Copyright 2014 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 DEVICE_USB_USB_DEVICE_H_
 #define DEVICE_USB_USB_DEVICE_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
+#include "base/strings/string16.h"
 
 namespace device {
 
 class UsbDeviceHandle;
 struct UsbConfigDescriptor;
 
 // A UsbDevice object represents a detected USB device, providing basic
 // information about it. For further manipulation of the device, a
 // UsbDeviceHandle must be created from Open() method.
 class UsbDevice : public base::RefCountedThreadSafe<UsbDevice> {
@@ skipping 25 matching lines @@
   // Explicitly closes a device handle. This method will be automatically called
   // by the destructor of a UsbDeviceHandle as well.
   // Closing a closed handle is a safe
   // Blocking method. Must be called on FILE thread.
   virtual bool Close(scoped_refptr<UsbDeviceHandle> handle) = 0;
 
   // Gets the UsbConfigDescriptor for the active device configuration.
   // Blocking method. Must be called on FILE thread.
   virtual const UsbConfigDescriptor& GetConfiguration() = 0;
 
+  // Gets the manufacturer string of the device, or returns false.
+  // Blocking method. Must be called on FILE thread.
+  virtual bool GetManufacturer(base::string16* manufacturer) = 0;
+
+  // Gets the product string of the device, or returns false.
+  // Blocking method. Must be called on FILE thread.
+  virtual bool GetProduct(base::string16* product) = 0;
+
+  // Gets the serial number string of the device, or returns false.
+  // Blocking method. Must be called on FILE thread.
+  virtual bool GetSerialNumber(base::string16* serial) = 0;
+
   void AddObserver(Observer* obs) { observer_list_.AddObserver(obs); }
   void RemoveObserver(Observer* obs) { observer_list_.RemoveObserver(obs); }
 
  protected:
   UsbDevice(uint16 vendor_id, uint16 product_id, uint32 unique_id);
   virtual ~UsbDevice();
 
   void NotifyDisconnect();
 
  private:
   friend class base::RefCountedThreadSafe<UsbDevice>;
 
   const uint16 vendor_id_;
   const uint16 product_id_;
   const uint32 unique_id_;
 
   ObserverList<Observer> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(UsbDevice);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_USB_USB_DEVICE_H_