Remove is_win/OS_WIN checks in shell code

shell/command_line_util.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 "shell/command_line_util.h"
 
 #include <functional>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 55 matching lines @@
 
 void ApplyApplicationArgs(Context* context, const std::string& args) {
   std::string args_for_value;
   if (ParseArgsFor(args, &args_for_value))
     GetAppURLAndSetArgs(args_for_value, context);
 }
 
 void RunCommandLineApps(Context* context) {
   const auto& command_line = *base::CommandLine::ForCurrentProcess();
   for (const auto& arg : command_line.GetArgs()) {
-    std::string arg2;
-#if defined(OS_WIN)
-    arg2 = base::UTF16ToUTF8(arg);
-#else
-    arg2 = arg;
-#endif
-    GURL url = GetAppURLAndSetArgs(arg2, context);
+    GURL url = GetAppURLAndSetArgs(arg, context);
     if (!url.is_valid())
       return;
     context->Run(url);
   }
 }
 
 }  // namespace shell
 }  // namespace mojo