Fixes for re-enabling more MSVC level 4 warnings: sandbox/ edition

sandbox/win/src/sync_policy.h

Index: sandbox/win/src/sync_policy.h
diff --git a/sandbox/win/src/sync_policy.h b/sandbox/win/src/sync_policy.h
index 4383998205f9fc79d266ddb981b3620c71cd2d8e..e370e4bdacb0c47ccbe4a2107514234236ec3268 100644
--- a/sandbox/win/src/sync_policy.h
+++ b/sandbox/win/src/sync_policy.h
@@ -33,17 +33,17 @@ class SyncPolicy {
   // Performs the desired policy action on a request.
   // client_info is the target process that is making the request and
   // eval_result is the desired policy action to accomplish.
-  static DWORD CreateEventAction(EvalResult eval_result,
-                                 const ClientInfo& client_info,
-                                 const base::string16 &event_name,
-                                 uint32 event_type,
-                                 uint32 initial_state,
-                                 HANDLE *handle);
-  static DWORD OpenEventAction(EvalResult eval_result,
-                               const ClientInfo& client_info,
-                               const base::string16 &event_name,
-                               uint32 desired_access,
-                               HANDLE *handle);
+  static NTSTATUS CreateEventAction(EvalResult eval_result,
+                                    const ClientInfo& client_info,
+                                    const base::string16 &event_name,
+                                    uint32 event_type,
+                                    uint32 initial_state,
+                                    HANDLE *handle);
+  static NTSTATUS OpenEventAction(EvalResult eval_result,
+                                  const ClientInfo& client_info,
+                                  const base::string16 &event_name,
+                                  uint32 desired_access,
+                                  HANDLE *handle);
 };
 
 }  // namespace sandbox