Fix the tree.

Forgot windows include

BUG=none
TBR=scottmg
Review URL: https://chromiumcodereview.appspot.com/10872021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152840 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/process_singleton_win.cc b/chrome/browser/process_singleton_win.cc
index 62a469f3..45cd8e5 100644
--- a/chrome/browser/process_singleton_win.cc
+++ b/chrome/browser/process_singleton_win.cc
@@ -4,6 +4,8 @@
 
 #include "chrome/browser/process_singleton.h"
 
+#include <shellapi.h>
+
 #include "base/base_paths.h"
 #include "base/command_line.h"
 #include "base/file_path.h"