Define Print Preview default printer selection policy

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index e728fdb22d81cab7700e2699bc31625666203d98..a3aeaf7976c8e45a76343d6199c1b8e8cd82df3d 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -1098,6 +1098,12 @@ const char kPrintingEnabled[] = "printing.enabled";
 // Boolean controlling whether print preview is disabled.
 const char kPrintPreviewDisabled[] = "printing.print_preview_disabled";
 
+// A pref holding the value of the policy used to control default destination
+// selection in the Print Preview.
+// See PrintPreviewDefaultPrinterSelection policy.
+const char kPrintPreviewDefaultDestinationSelectionRules[] =
+    "printing.default_destination_selection_rules";
+
 // An integer pref specifying the fallback behavior for sites outside of content
 // packs. One of:
 // 0: Allow (does nothing)