Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/storage_monitor/storage_monitor_linux.cc

 // Copyright (c) 2012 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.
 
 // StorageMonitorLinux implementation.
 
 #include "chrome/browser/storage_monitor/storage_monitor_linux.h"
 
 #include <mntent.h>
 #include <stdio.h>
@@ skipping 126 matching lines @@
   else
     return storage_info.Pass();  // Not a supported type.
 
   ScopedUdevDeviceObject device(
       udev_device_new_from_devnum(udev_obj.get(), device_type,
                                   device_stat.st_rdev));
   if (!device.get())
     return storage_info.Pass();
 
   base::string16 volume_label =
-      UTF8ToUTF16(GetUdevDevicePropertyValue(device.get(), kLabel));
+      base::UTF8ToUTF16(GetUdevDevicePropertyValue(device.get(), kLabel));
   base::string16 vendor_name =
-      UTF8ToUTF16(GetUdevDevicePropertyValue(device.get(), kVendor));
+      base::UTF8ToUTF16(GetUdevDevicePropertyValue(device.get(), kVendor));
   base::string16 model_name =
-      UTF8ToUTF16(GetUdevDevicePropertyValue(device.get(), kModel));
+      base::UTF8ToUTF16(GetUdevDevicePropertyValue(device.get(), kModel));
 
   std::string unique_id = MakeDeviceUniqueId(device.get());
 
   // Keep track of device info details to see how often we get invalid values.
   MediaStorageUtil::RecordDeviceInfoHistogram(true, unique_id, volume_label);
 
   const char* value =
       udev_device_get_sysattr_value(device.get(), kRemovableSysAttr);
   if (!value) {
     // |parent_device| is owned by |device| and does not need to be cleaned
@@ skipping 331 matching lines @@
   mount_point_info.storage_info = *storage_info;
   mount_info_map_[mount_point] = mount_point_info;
   mount_priority_map_[mount_device][mount_point] = removable;
   receiver()->ProcessAttach(*storage_info);
 }
 
 StorageMonitor* StorageMonitor::Create() {
   const base::FilePath kDefaultMtabPath("/etc/mtab");
   return new StorageMonitorLinux(kDefaultMtabPath);
 }