Making GenericScopedHandle capable of handling handle types other than HANDLE.

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 11b34ee88d444f1c03bcf9625dcfa05491e064ca..667609d584c0b5fb6b09812647de3c7d2faba823 100644
--- a/printing/backend/win_helper.h
+++ b/printing/backend/win_helper.h
@@ -20,9 +20,22 @@ namespace printing {
 
 class PrinterHandleTraits {

[Vitaly Buka (NO REVIEWS), 2012/03/05 18:52:14]

PrinterHandleTraits : public HandleTraits {

 CloseHandle

}

[alexeypa (please no reviews), 2012/03/05 18:56:58]

The same thing, trait classes are unrelated in this case.

  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;