Replace ToLower calls to the new format

components/nacl/renderer/nexe_load_manager.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 "components/nacl/renderer/nexe_load_manager.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_tokenizer.h"
@@ skipping 325 matching lines @@
     uint32_t argc, const char* argn[], const char* argv[]) {
   init_time_ = base::Time::Now();
 
   for (size_t i = 0; i < argc; ++i) {
     std::string name(argn[i]);
     std::string value(argv[i]);
     args_[name] = value;
   }
 
   // Store mime_type_ at initialization time since we make it lowercase.
-  mime_type_ = base::StringToLowerASCII(LookupAttribute(args_, kTypeAttribute));
+  mime_type_ = base::ToLowerASCII(LookupAttribute(args_, kTypeAttribute));
 }
 
 void NexeLoadManager::ReportStartupOverhead() const {
   base::TimeDelta overhead = base::Time::Now() - init_time_;
   HistogramStartupTimeMedium(
       "NaCl.Perf.StartupTime.NaClOverhead", overhead, nexe_size_);
 }
 
 bool NexeLoadManager::RequestNaClManifest(const std::string& url) {
   if (plugin_base_url_.is_valid()) {
@@ skipping 81 matching lines @@
   // to provide error handling.
 }
 
 void NexeLoadManager::CopyCrashLogToJsConsole(const std::string& crash_log) {
   base::StringTokenizer t(crash_log, "\n");
   while (t.GetNext())
     LogToConsole(t.token());
 }
 
 }  // namespace nacl