Cache sandbox tokens

sandbox/win/src/broker_services.h

Index: sandbox/win/src/broker_services.h
diff --git a/sandbox/win/src/broker_services.h b/sandbox/win/src/broker_services.h
index d2494437751ae04445116990036e60d61d8d35a0..ba189f41f836ae2909805a8e4491c8e8d3a12418 100644
--- a/sandbox/win/src/broker_services.h
+++ b/sandbox/win/src/broker_services.h
@@ -8,6 +8,7 @@
 #include <list>
 #include <map>
 #include <set>
+#include <utility>
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/win/scoped_handle.h"
@@ -105,6 +106,9 @@ class BrokerServicesBase FINAL : public BrokerServices,
   // job. Consult |jobless_process_handles_| for handles of pocess without job.
   std::set<DWORD> child_process_ids_;
 
+  typedef std::map<uint32_t, std::pair<HANDLE, HANDLE>> TokenCacheMap;
+  TokenCacheMap token_cache_;
+
   DISALLOW_COPY_AND_ASSIGN(BrokerServicesBase);
 };