PrintPreview: Added code to identify the printer default duplex value.

printing/print_job_constants.h

Index: printing/print_job_constants.h
diff --git a/printing/print_job_constants.h b/printing/print_job_constants.h
index 99b28928c23750ba02f60db0f462768ab410dec2..a1286dbaf5893e4a210e8f2ee9a115227aff8af7 100644
--- a/printing/print_job_constants.h
+++ b/printing/print_job_constants.h
@@ -54,6 +54,13 @@ enum DuplexMode {
   SHORT_EDGE,
 };
 
+// Specifies the possible default duplex setting values.
+enum DefaultDuplexSetting {

[vandebo (ex-Chrome), 2011/09/07 21:55:57]

Can we use the DuplexMode enum instead of introducing another enum with similar
values?  Maybe add DUPLEX_UNSUPPORTED as an option there?

[kmadhusu, 2011/09/07 23:21:56]

Added UNKNOWN_DUPLEX_MODE in DuplexMode enum.

+  UNKNOWN = -1,
+  ONE_SIDED,
+  TWO_SIDED,
+};
+
 // Specifies the horizontal alignment of the headers and footers.
 enum HorizontalHeaderFooterPosition {
   LEFT,