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

base/allocator/partition_allocator/address_space_randomization.cc

Index: base/allocator/partition_allocator/address_space_randomization.cc
diff --git a/base/allocator/partition_allocator/address_space_randomization.cc b/base/allocator/partition_allocator/address_space_randomization.cc
index d54fb4434e3104c8c7b90aedfcc767887cfef5be..36fdaf19101fcf7a1f30a9f9b7a8f3b8981100d9 100644
--- a/base/allocator/partition_allocator/address_space_randomization.cc
+++ b/base/allocator/partition_allocator/address_space_randomization.cc
@@ -6,11 +6,11 @@
 
 #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>