Define Print Preview default printer selection policy

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 51a5257336c405f444a7ecdd651d94e5225fa95d..5a6195a3f52f5ebee3cbeaa7e4b025c4befc1aa8 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -316,6 +316,11 @@ const char kDisablePreconnect[]             = "disable-preconnect";
 // Disables print preview (For testing, and for users who don't like us. :[ )
 const char kDisablePrintPreview[]           = "disable-print-preview";
 
+// Default print destination selection rules.
+// See PrintPreviewDefaultPrinterSelection policy for details.
+const char kPrintPreviewDefaultDestinationSelectionRules[] =
+    "default-printer-selection-rules";
+
 // Normally when the user attempts to navigate to a page that was the result of
 // a post we prompt to make sure they want to. This switch may be used to
 // disable that check. This switch is used during automated testing.