Only include base/win/windows_version.h on Windows build

base/allocator/partition_allocator/address_space_randomization.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 "base/allocator/partition_allocator/address_space_randomization.h"
 
 #include "base/allocator/partition_allocator/page_allocator.h"
 #include "base/allocator/partition_allocator/spin_lock.h"
-#include "base/win/windows_version.h"
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
+#include "base/win/windows_version.h"
 #else
 #include <sys/time.h>
 #include <unistd.h>
 #endif
 
 // VersionHelpers.h must be included after windows.h.
 #if defined(OS_WIN)
 #include <VersionHelpers.h>
 #endif
 
@@ skipping 109 matching lines @@
   // This is a good range on Windows, Linux and Mac.
   // Allocates in the 0.5-1.5GB region.
   random &= 0x3fffffff;
   random += 0x20000000;
 #endif  // defined(ARCH_CPU_X86_64)
   random &= kPageAllocationGranularityBaseMask;
   return reinterpret_cast<void*>(random);
 }
 
 }  // namespace base