Deleted OS_WIN and all Windows specific files from base.

base/test/multiprocess_test.cc

 // Copyright (c) 2012 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 "base/test/multiprocess_test.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 22 matching lines @@
   return cmd_line;
 }
 
 // MultiProcessTest ------------------------------------------------------------
 
 MultiProcessTest::MultiProcessTest() {
 }
 
 Process MultiProcessTest::SpawnChild(const std::string& procname) {
   LaunchOptions options;
-#if defined(OS_WIN)
-  options.start_hidden = true;
-#endif
   return SpawnChildWithOptions(procname, options);
 }
 
 Process MultiProcessTest::SpawnChildWithOptions(
     const std::string& procname,
     const LaunchOptions& options) {
   return SpawnMultiProcessTestChild(procname, MakeCmdLine(procname), options);
 }
 
 CommandLine MultiProcessTest::MakeCmdLine(const std::string& procname) {
   CommandLine command_line = GetMultiProcessTestChildBaseCommandLine();
   command_line.AppendSwitchASCII(switches::kTestChildProcess, procname);
   return command_line;
 }
 
 }  // namespace base