Made setting lowbox token a warning.

sandbox/win/src/sandbox.h

Index: sandbox/win/src/sandbox.h
diff --git a/sandbox/win/src/sandbox.h b/sandbox/win/src/sandbox.h
index fd9cd66b1a783a06601acd26103c62da04ca476b..a07f8aa8e0a72be4d46ee585c9c8e60699d2c840 100644
--- a/sandbox/win/src/sandbox.h
+++ b/sandbox/win/src/sandbox.h
@@ -67,6 +67,9 @@ class BrokerServices {
   //   process. This can be null if the exe_path parameter is not null.
   //   policy: This is the pointer to the policy object for the sandbox to
   //   be created.
+  //   last_warning: The argument will contain an indication on whether
+  //   the process security was initialized completely, Only set if the
+  //   process can be used without a serious compromise in security.
   //   target: returns the resulting target process information such as process
   //   handle and PID just as if CreateProcess() had been called. The caller is
   //   responsible for closing the handles returned in this structure.
@@ -75,6 +78,7 @@ class BrokerServices {
   virtual ResultCode SpawnTarget(const wchar_t* exe_path,
                                  const wchar_t* command_line,
                                  TargetPolicy* policy,
+                                 ResultCode* last_warning,
                                  PROCESS_INFORMATION* target) = 0;
 
   // This call blocks (waits) for all the targets to terminate.