1diff --git base/command_line.cc base/command_line.cc 2index 8f26e95cc6c57..141eea233470a 100644 3--- base/command_line.cc 4+++ base/command_line.cc 5@@ -337,11 +337,10 @@ void CommandLine::AppendSwitchPath(StringPiece switch_string, 6 7 void CommandLine::AppendSwitchNative(StringPiece switch_string, 8 CommandLine::StringPieceType value) { 9-#if BUILDFLAG(IS_WIN) 10 const std::string switch_key = ToLowerASCII(switch_string); 11+#if BUILDFLAG(IS_WIN) 12 StringType combined_switch_string(UTF8ToWide(switch_key)); 13 #elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA) 14- StringPiece switch_key = switch_string; 15 StringType combined_switch_string(switch_key); 16 #endif 17 size_t prefix_length = GetSwitchPrefixLength(combined_switch_string); 18