wstring: make net::GetSuggestedFilename return utf-16

ui/base/dragdrop/os_exchange_data_provider_win.cc

Index: ui/base/dragdrop/os_exchange_data_provider_win.cc
diff --git a/ui/base/dragdrop/os_exchange_data_provider_win.cc b/ui/base/dragdrop/os_exchange_data_provider_win.cc
index 657a917d8347390e1664917c21253f5987494542..22a4e62ad751927d384de64417823298d7b14719 100644
--- a/ui/base/dragdrop/os_exchange_data_provider_win.cc
+++ b/ui/base/dragdrop/os_exchange_data_provider_win.cc
@@ -844,8 +844,8 @@ static void CreateValidFileNameFromTitle(const GURL& url,
                                          std::wstring* validated) {
   if (title.empty()) {
     if (url.is_valid()) {
-      *validated = net::GetSuggestedFilename(
-          url, std::string(), std::string(), FilePath()).ToWStringHack();
+      *validated = UTF16ToWide(
+          net::GetSuggestedFilename(url, "", "", string16()));
     } else {
       // Nothing else can be done, just use a default.
       *validated =