[Coverity] Fix signed/unsigned issue.

NtQueryObject returns, and NT_SUCCESS expects, NTSTATUS (a LONG variable). NT_SUCCESS checks for >=0, so CHECK statements as they are will never fire.

CID=104038
BUG=none
TEST=none

Review URL: https://chromiumcodereview.appspot.com/10407084

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@138286 0039d316-1c4b-4281-b951-d872f2087c98

content/common/sandbox_policy.cc

@@ -489,7 +489,7 @@ void CheckDuplicateHandle(HANDLE handle) {
   OBJECT_TYPE_INFORMATION* type_info =
       reinterpret_cast<OBJECT_TYPE_INFORMATION*>(buffer);
   ULONG size = sizeof(buffer) - sizeof(wchar_t);
-  DWORD error;
+  NTSTATUS error;
   error = g_QueryObject(handle, ObjectTypeInformation, type_info, size, &size);
   CHECK(NT_SUCCESS(error));
   type_info->Name.Buffer[type_info->Name.Length / sizeof(wchar_t)] = L'\0';