Restored disable print preview 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 a04c81a0387450f8d957b7dc64dd0248b694ebe7..f7f16ca11bfc583dbb96993c5a1a02a12708fd8e 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -315,6 +315,9 @@ const char kDisablePreconnect[]             = "disable-preconnect";
 const char kDisablePrerenderLocalPredictor[] =
     "disable-prerender-local-predictor";
 
+// Disables print preview (For testing, and for users who don't like us. :[ )
+const char kDisablePrintPreview[]           = "disable-print-preview";
+
 // 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.