am 802fe3b3: Lock session list in CdmEngine OnTimerEvent

* commit '802fe3b35c42975cad30b947903e002500f2a6c7':
  Lock session list in CdmEngine OnTimerEvent

libwvdrmengine/cdm/core/include/cdm_engine.h

@@ -9,6 +9,7 @@
 #include "certificate_provisioning.h"
 #include "crypto_session.h"
 #include "initialization_data.h"
+#include "lock.h"
 #include "oemcrypto_adapter.h"
 #include "scoped_ptr.h"
 #include "wv_cdm_types.h"
@@ -154,6 +155,12 @@ class CdmEngine {
   scoped_ptr<UsagePropertySet> usage_property_set_;
   int64_t last_usage_information_update_time_;
 
+  Lock session_list_lock_;
+  // If the timer is currently active -- do not delete any sessions.
+  bool timer_event_active_;
+  // Sessions to be deleted after the timer has finished.
+  std::vector<CdmSession*> dead_sessions_;
+
   CORE_DISALLOW_COPY_AND_ASSIGN(CdmEngine);
 };