Fix GN missing headers in //base

components/nacl/browser/nacl_browser.cc

Index: components/nacl/browser/nacl_browser.cc
diff --git a/components/nacl/browser/nacl_browser.cc b/components/nacl/browser/nacl_browser.cc
index ca3fb97be5de093bb0ffc6d7aa14ade03829a720..f979624ef677a51936ea6608ba0a8f4566e6287c 100644
--- a/components/nacl/browser/nacl_browser.cc
+++ b/components/nacl/browser/nacl_browser.cc
@@ -17,11 +17,14 @@
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
-#include "base/win/windows_version.h"
 #include "build/build_config.h"
 #include "content/public/browser/browser_thread.h"
 #include "url/gurl.h"
 
+#if defined(OS_WIN)
+#include "base/win/windows_version.h"
+#endif
+
 namespace {
 
 // An arbitrary delay to coalesce multiple writes to the cache.