ScopedProcessInformation protects against process/thread handle leaks from CreateProcess calls.

printing/backend/win_helper.h

Index: printing/backend/win_helper.h
diff --git a/printing/backend/win_helper.h b/printing/backend/win_helper.h
index 667609d584c0b5fb6b09812647de3c7d2faba823..e9543331a10433ca60cc2602b960fec8b4938a2b 100644
--- a/printing/backend/win_helper.h
+++ b/printing/backend/win_helper.h
@@ -30,6 +30,10 @@ class PrinterHandleTraits {
     return handle != NULL;
   }
 
+  static bool IsSame(HANDLE lhs, HANDLE rhs) {
+    return lhs == rhs;
+  }
+
   static HANDLE NullHandle() {
     return NULL;
   }