[OSX] Remove wide->NSString conversion

base/sys_string_conversions_mac.mm

Index: base/sys_string_conversions_mac.mm
diff --git a/base/sys_string_conversions_mac.mm b/base/sys_string_conversions_mac.mm
index 5f507ce927a798268eaba9451c0bf7d426efbde6..851d9a3312c3577b9fc9eaecace957d80d47b939 100644
--- a/base/sys_string_conversions_mac.mm
+++ b/base/sys_string_conversions_mac.mm
@@ -166,11 +166,6 @@ NSString* SysUTF16ToNSString(const string16& utf16) {
       SysUTF16ToCFStringRef(utf16));
 }
 
-NSString* SysWideToNSString(const std::wstring& wide) {
-  return (NSString*)base::mac::CFTypeRefToNSObjectAutorelease(
-      SysWideToCFStringRef(wide));
-}
-
 std::string SysCFStringRefToUTF8(CFStringRef ref) {
   return CFStringToSTLStringWithEncodingT<std::string>(ref,
                                                        kNarrowStringEncoding);
@@ -181,11 +176,6 @@ string16 SysCFStringRefToUTF16(CFStringRef ref) {
                                                     kMediumStringEncoding);
 }
 
-std::wstring SysCFStringRefToWide(CFStringRef ref) {
-  return CFStringToSTLStringWithEncodingT<std::wstring>(ref,
-                                                        kWideStringEncoding);
-}
-
 std::string SysNSStringToUTF8(NSString* nsstring) {
   if (!nsstring)
     return std::string();
@@ -198,10 +188,4 @@ string16 SysNSStringToUTF16(NSString* nsstring) {
   return SysCFStringRefToUTF16(reinterpret_cast<CFStringRef>(nsstring));
 }
 
-std::wstring SysNSStringToWide(NSString* nsstring) {
-  if (!nsstring)
-    return std::wstring();
-  return SysCFStringRefToWide(reinterpret_cast<CFStringRef>(nsstring));
-}
-
 }  // namespace base