Move string descriptor getters from UsbDeviceHandle to UsbDevice.

extensions/browser/api/usb_private/usb_private_api.cc

 // 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.
 
 #include "extensions/browser/api/usb_private/usb_private_api.h"
 
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
@@ skipping 15 matching lines @@
 using device::UsbDeviceFilter;
 using device::UsbDeviceHandle;
 using device::UsbService;
 
 typedef std::vector<scoped_refptr<UsbDevice> > DeviceVector;
 
 namespace {
 
 const char kErrorInitService[] = "Failed to initialize USB service.";
 const char kErrorNoDevice[] = "No such device.";
-const char kErrorOpen[] = "Failed to open device.";
 
 }  // namespace
 
 namespace extensions {
 
 UsbPrivateGetDevicesFunction::UsbPrivateGetDevicesFunction() {
 }
 
 UsbPrivateGetDevicesFunction::~UsbPrivateGetDevicesFunction() {
 }
@@ skipping 66 matching lines @@
   if (name) {
     device_info.vendor_name.reset(new std::string(name));
   }
 
   name = device::UsbIds::GetProductName(device_info.vendor_id,
                                         device_info.product_id);
   if (name) {
     device_info.product_name.reset(new std::string(name));
   }
 
-  scoped_refptr<UsbDeviceHandle> device_handle = device->Open();
-  if (!device_handle.get()) {
-    CompleteWithError(kErrorOpen);
-    return;
-  }
-
   base::string16 utf16;
-  if (device_handle->GetManufacturer(&utf16)) {
+  if (device->GetManufacturer(&utf16)) {
     device_info.manufacturer_string.reset(
         new std::string(base::UTF16ToUTF8(utf16)));
   }
 
-  if (device_handle->GetProduct(&utf16)) {
+  if (device->GetProduct(&utf16)) {
     device_info.product_string.reset(new std::string(base::UTF16ToUTF8(utf16)));
   }
 
-  if (device_handle->GetSerial(&utf16)) {
+  if (device->GetSerialNumber(&utf16)) {
     device_info.serial_string.reset(new std::string(base::UTF16ToUTF8(utf16)));
   }
 
   SetResult(device_info.ToValue().release());
   AsyncWorkCompleted();
 }
 
 }  // namespace extensions