Making GenericScopedHandle capable of handling handle types other than HANDLE.

Review URL: http://codereview.chromium.org/9582045

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@124980 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 0 deletions

diff --git a/printing/backend/win_helper.h b/printing/backend/win_helper.h
index 11b34ee..667609d 100644
--- a/printing/backend/win_helper.h
+++ b/printing/backend/win_helper.h
@@ -20,9 +20,22 @@ namespace printing {
 
 class PrinterHandleTraits {
  public:
+  typedef HANDLE Handle;
+
   static bool CloseHandle(HANDLE handle) {
     return ::ClosePrinter(handle) != FALSE;
   }
+
+  static bool IsHandleValid(HANDLE handle) {
+    return handle != NULL;
+  }
+
+  static HANDLE NullHandle() {
+    return NULL;
+  }
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(PrinterHandleTraits);
 };
 
 typedef base::win::GenericScopedHandle<PrinterHandleTraits> ScopedPrinterHandle;