Move UTF16ToASCII, remove WideToASCII.

net/disk_cache/cache_util.cc

Index: net/disk_cache/cache_util.cc
diff --git a/net/disk_cache/cache_util.cc b/net/disk_cache/cache_util.cc
index 4452e7b0aa912017c2bc9294a708515f24391166..276f2f3381b632a111df9d344e982406fbe4b230 100644
--- a/net/disk_cache/cache_util.cc
+++ b/net/disk_cache/cache_util.cc
@@ -9,6 +9,7 @@
 #include "base/location.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
+#include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/threading/worker_pool.h"
 
@@ -118,7 +119,7 @@ bool DelayedCacheCleanup(const base::FilePath& full_path) {
   std::string name_str = name.value();
 #elif defined(OS_WIN)
   // We created this file so it should only contain ASCII.
-  std::string name_str = WideToASCII(name.value());
+  std::string name_str = base::UTF16ToASCII(name.value());
 #endif
 
   base::FilePath to_delete = GetTempCacheName(path, name_str);