Deleted OS_WIN and all Windows specific files from base.

base/process/process_metrics.h

 // Copyright (c) 2013 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.
 
 // This file contains routines for gathering resource statistics for processes
 // running on the system.
 
 #ifndef BASE_PROCESS_PROCESS_METRICS_H_
 #define BASE_PROCESS_PROCESS_METRICS_H_
 
 #include <string>
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/process/process_handle.h"
 #include "base/time/time.h"
 #include "base/values.h"
 
 #if defined(OS_MACOSX)
 #include <mach/mach.h>
 #endif
 
 namespace base {
 
-#if defined(OS_WIN)
-struct IoCounters : public IO_COUNTERS {
-};
-#elif defined(OS_POSIX)
+#if defined(OS_POSIX)
 struct IoCounters {
   uint64_t ReadOperationCount;
   uint64_t WriteOperationCount;
   uint64_t OtherOperationCount;
   uint64_t ReadTransferCount;
   uint64_t WriteTransferCount;
   uint64_t OtherTransferCount;
 };
 #endif
 
@@ skipping 343 matching lines @@
   SystemDiskInfo disk_info_;
 #endif
 #if defined(OS_CHROMEOS)
   SwapInfo swap_info_;
 #endif
 };
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_PROCESS_METRICS_H_