Added ScopedPrinterHandle

TEST=it compiles
BUG=none

Review URL: http://codereview.chromium.org/9480026

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@124640 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 12 insertions, 1 deletions

diff --git a/printing/backend/win_helper.h b/printing/backend/win_helper.h
index a08e69a..11b34ee 100644
--- a/printing/backend/win_helper.h
+++ b/printing/backend/win_helper.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
@@ -12,11 +12,22 @@
 #include <xpsprint.h>
 
 #include "base/string16.h"
+#include "base/win/scoped_handle.h"
 #include "printing/printing_export.h"
 
 // These are helper functions for dealing with Windows Printing.
 namespace printing {
 
+class PrinterHandleTraits {
+ public:
+  static bool CloseHandle(HANDLE handle) {
+    return ::ClosePrinter(handle) != FALSE;
+  }
+};
+
+typedef base::win::GenericScopedHandle<PrinterHandleTraits> ScopedPrinterHandle;
+
+
 // Wrapper class to wrap the XPS APIs (PTxxx APIs). This is needed because these
 // APIs are not available by default on XP. We could delayload prntvpt.dll but
 // this would mean having to add that to every binary that links with