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

chrome/browser/storage_monitor/storage_monitor_mac.mm

 // 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.
 
 #include "chrome/browser/storage_monitor/storage_monitor_mac.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 67 matching lines @@
         CFUUIDCreateString(NULL, uuid));
     if (uuid_string.get())
       unique_id = base::SysCFStringRefToUTF8(uuid_string);
   }
   if (unique_id.empty()) {
     base::string16 revision = GetUTF16FromDictionary(
         dict, kDADiskDescriptionDeviceRevisionKey);
     base::string16 unique_id2 = vendor;
     unique_id2 = JoinName(unique_id2, model);
     unique_id2 = JoinName(unique_id2, revision);
-    unique_id = UTF16ToUTF8(unique_id2);
+    unique_id = base::UTF16ToUTF8(unique_id2);
   }
 
   CFBooleanRef is_removable_ref =
       base::mac::GetValueFromDictionary<CFBooleanRef>(
           dict, kDADiskDescriptionMediaRemovableKey);
   bool is_removable = is_removable_ref && CFBooleanGetValue(is_removable_ref);
   // Checking for DCIM only matters on removable devices.
   bool has_dcim = is_removable && MediaStorageUtil::HasDcim(location);
   StorageInfo::Type device_type = GetDeviceType(is_removable, has_dcim);
   std::string device_id;
@@ skipping 259 matching lines @@
                  AsWeakPtr(), dict, update_type));
 }
 
 
 bool StorageMonitorMac::ShouldPostNotificationForDisk(
     const StorageInfo& info) const {
   // Only post notifications about disks that have no empty fields and
   // are removable. Also exclude disk images (DMGs).
   return !info.device_id().empty() &&
          !info.location().empty() &&
-         info.model_name() != ASCIIToUTF16(kDiskImageModelName) &&
+         info.model_name() != base::ASCIIToUTF16(kDiskImageModelName) &&
          StorageInfo::IsMassStorageDevice(info.device_id());
 }
 
 bool StorageMonitorMac::FindDiskWithMountPoint(
     const base::FilePath& mount_point,
     StorageInfo* info) const {
   for (std::map<std::string, StorageInfo>::const_iterator
       it = disk_info_map_.begin(); it != disk_info_map_.end(); ++it) {
     if (it->second.location() == mount_point.value()) {
       *info = it->second;
       return true;
     }
   }
   return false;
 }
 
 StorageMonitor* StorageMonitor::Create() {
   return new StorageMonitorMac();
 }