Replace ToLower calls to the new format

chrome/browser/chromeos/power/peripheral_battery_observer.cc

 // Copyright (c) 2013 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/chromeos/power/peripheral_battery_observer.h"
 
 #include <vector>
 
 #include "ash/shell.h"
 #include "ash/strings/grit/ash_strings.h"
@@ skipping 43 matching lines @@
          base::EndsWith(path, kHIDBatteryPathSuffix,
                         base::CompareCase::INSENSITIVE_ASCII);
 }
 
 std::string ExtractBluetoothAddress(const std::string& path) {
   int header_size = strlen(kHIDBatteryPathPrefix);
   int end_size = strlen(kHIDBatteryPathSuffix);
   int key_len = path.size() - header_size - end_size;
   if (key_len <= 0)
     return std::string();
-  std::string reverse_address = path.substr(header_size, key_len);
-  base::StringToLowerASCII(&reverse_address);
+  std::string reverse_address =
+      base::ToLowerASCII(path.substr(header_size, key_len));
   std::vector<std::string> result = base::SplitString(
       reverse_address, ":", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
   std::reverse(result.begin(), result.end());
   std::string address = base::JoinString(result, ":");
   return address;
 }
 
 class PeripheralBatteryNotificationDelegate : public NotificationDelegate {
  public:
   explicit PeripheralBatteryNotificationDelegate(const std::string& id)
@@ skipping 98 matching lines @@
 
 void PeripheralBatteryObserver::InitializeOnBluetoothReady(
     scoped_refptr<device::BluetoothAdapter> adapter) {
   bluetooth_adapter_ = adapter;
   CHECK(bluetooth_adapter_.get());
   bluetooth_adapter_->AddObserver(this);
 }
 
 void PeripheralBatteryObserver::RemoveBattery(const std::string& address) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  std::string address_lowercase = address;
-  base::StringToLowerASCII(&address_lowercase);
+  std::string address_lowercase = base::ToLowerASCII(address);
   std::map<std::string, BatteryInfo>::iterator it =
       batteries_.find(address_lowercase);
   if (it != batteries_.end()) {
     batteries_.erase(it);
     CancelNotification(address_lowercase);
   }
 }
 
 bool PeripheralBatteryObserver::PostNotification(const std::string& address,
                                                  const BatteryInfo& battery) {
@@ skipping 32 matching lines @@
 
 void PeripheralBatteryObserver::CancelNotification(const std::string& address) {
   // If last_used_profile_ is NULL then no notification has been posted yet.
   if (notification_profile_) {
     g_browser_process->notification_ui_manager()->CancelById(
         address, NotificationUIManager::GetProfileID(notification_profile_));
   }
 }
 
 }  // namespace chromeos