chrome: remove --disable-async-dns switch

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 <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 57 matching lines @@
          prefs::kWebKitAllowRunningInsecureContent, true},
         {switches::kAllowCrossOriginAuthPrompt,
          prefs::kAllowCrossOriginAuthPrompt, true},
         {switches::kDisablePrintPreview, prefs::kPrintPreviewDisabled, true},
 #if defined(OS_CHROMEOS)
         {chromeos::switches::kEnableTouchpadThreeFingerClick,
          prefs::kEnableTouchpadThreeFingerClick, true},
         {switches::kEnableUnifiedDesktop,
          prefs::kUnifiedDesktopEnabledByDefault, true},
 #endif
-        {switches::kDisableAsyncDns, prefs::kBuiltInDnsClientEnabled, false},

[tfarina, 2016/10/03 17:35:29]

Do I need to remove kBuiltInDnsClientEnabled as well? I feel like I'm missing
something.

         {switches::kUnsafePacUrl, prefs::kPacHttpsUrlStrippingEnabled, false},
 };
 
 const CommandLinePrefStore::IntegerSwitchToPreferenceMapEntry
     CommandLinePrefStore::integer_switch_map_[] = {
       { switches::kDiskCacheSize, prefs::kDiskCacheSize },
       { switches::kMediaCacheSize, prefs::kMediaCacheSize },
     };
 
 CommandLinePrefStore::CommandLinePrefStore(
@@ skipping 110 matching lines @@
   }
 }
 
 void CommandLinePrefStore::ApplyBackgroundModeSwitches() {
   if (command_line_->HasSwitch(switches::kDisableExtensions)) {
     SetValue(prefs::kBackgroundModeEnabled,
              base::MakeUnique<base::FundamentalValue>(false),
              WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
   }
 }