Adding method to create process using LowBox token in sandbox code.

sandbox/win/src/policy_target.cc

Index: sandbox/win/src/policy_target.cc
diff --git a/sandbox/win/src/policy_target.cc b/sandbox/win/src/policy_target.cc
index 84b72037db68117aa4106c9754ae448f9cb5953d..fb464cc0cb737a7940716f8553f9b99855126a11 100644
--- a/sandbox/win/src/policy_target.cc
+++ b/sandbox/win/src/policy_target.cc
@@ -79,16 +79,6 @@ NTSTATUS WINAPI TargetNtSetInformationThread(
       break;
     if (ThreadImpersonationToken != thread_info_class)
       break;
-    if (!thread_information)
-      break;
-    HANDLE token;
-    if (sizeof(token) > thread_information_bytes)
-      break;
-
-    NTSTATUS ret = CopyData(&token, thread_information, sizeof(token));
-    if (!NT_SUCCESS(ret) || NULL != token)
-      break;
-

[cpu_(ooo_6.6-7.5), 2015/02/28 02:13:53]

can you remind me of why this removal?

[Shrikant Kelkar, 2015/02/28 02:33:46]

I forgot the exact number, but a call from wininet comes through from here fails
at sizeof(token) check and ends up modifying token to IdentifyLevel and then
onwards all other calls fail.

     // This is a revert to self.
     return STATUS_SUCCESS;
   } while (false);