Replace ToLower calls to the new format

chrome/browser/renderer_host/pepper/device_id_fetcher.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/renderer_host/pepper/device_id_fetcher.h"
 
 #include "base/files/file_util.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 141 matching lines @@
     LOG(ERROR) << "Unexpected salt bytes length: " << salt_bytes.size();
     RunCallbackOnIOThread(std::string(), PP_ERROR_FAILED);
     return;
   }
 
   char id_buf[256 / 8];  // 256-bits for SHA256
   std::string input = machine_id;
   input.append(kDRMIdentifierFile);
   input.append(salt_bytes.begin(), salt_bytes.end());
   crypto::SHA256HashString(input, &id_buf, sizeof(id_buf));
-  std::string id = base::StringToLowerASCII(
+  std::string id = base::ToLowerASCII(
       base::HexEncode(reinterpret_cast<const void*>(id_buf), sizeof(id_buf)));
   input = machine_id;
   input.append(kDRMIdentifierFile);
   input.append(id);
   crypto::SHA256HashString(input, &id_buf, sizeof(id_buf));
-  id = base::StringToLowerASCII(
+  id = base::ToLowerASCII(
       base::HexEncode(reinterpret_cast<const void*>(id_buf), sizeof(id_buf)));
 
   RunCallbackOnIOThread(id, PP_OK);
 }
 
 // TODO(raymes): This is temporary code to migrate ChromeOS devices to the new
 // scheme for generating device IDs. Delete this once we are sure most ChromeOS
 // devices have been migrated.
 void DeviceIDFetcher::LegacyComputeOnBlockingPool(
     const base::FilePath& profile_path,
@@ skipping 24 matching lines @@
         BrowserThread::IO,
         FROM_HERE,
         base::Bind(&DeviceIDFetcher::RunCallbackOnIOThread, this, id, result));
     return;
   }
   in_progress_ = false;
   callback_.Run(id, result);
 }
 
 }  // namespace chrome