Revert of Restored disable print preview policy.

chrome/browser/prefs/command_line_pref_store.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/prefs/command_line_pref_store.h"
 
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
@@ skipping 42 matching lines @@
       { switches::kAlwaysAuthorizePlugins, prefs::kPluginsAlwaysAuthorize,
           true },
       { switches::kNoPings, prefs::kEnableHyperlinkAuditing, false },
       { switches::kNoReferrers, prefs::kEnableReferrers, false },
       { switches::kAllowRunningInsecureContent,
         prefs::kWebKitAllowRunningInsecureContent, true },
       { switches::kNoDisplayingInsecureContent,
         prefs::kWebKitAllowDisplayingInsecureContent, false },
       { switches::kAllowCrossOriginAuthPrompt,
         prefs::kAllowCrossOriginAuthPrompt, true },
-      { switches::kDisablePrintPreview, prefs::kPrintPreviewDisabled, true },
 #if defined(OS_CHROMEOS)
       { chromeos::switches::kEnableTouchpadThreeFingerClick,
           prefs::kEnableTouchpadThreeFingerClick, true },
 #endif
       { switches::kDisableAsyncDns, prefs::kBuiltInDnsClientEnabled, false },
       { switches::kEnableAsyncDns, prefs::kBuiltInDnsClientEnabled, true },
 };
 
 const CommandLinePrefStore::IntegerSwitchToPreferenceMapEntry
     CommandLinePrefStore::integer_switch_map_[] = {
@@ skipping 102 matching lines @@
       list_value->Append(new base::StringValue(*it));
     }
     SetValue(prefs::kCipherSuiteBlacklist, list_value);
   }
 }
 
 void CommandLinePrefStore::ApplyBackgroundModeSwitches() {
   if (command_line_->HasSwitch(switches::kDisableExtensions))
     SetValue(prefs::kBackgroundModeEnabled, new base::FundamentalValue(false));
 }