Whitelist the flag --enable-fixed-position-compositing

chrome/browser/chromeos/login/login_utils.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/chromeos/login/login_utils.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/ash_switches.h"
@@ skipping 723 matching lines @@
       ::switches::kDeviceManagementUrl,
       ::switches::kForceDeviceScaleFactor,
       ::switches::kDisableAccelerated2dCanvas,
       ::switches::kDisableAcceleratedPlugins,
       ::switches::kDisableAcceleratedVideoDecode,
       ::switches::kDisableGpuWatchdog,
       ::switches::kDisableLoginAnimations,
       ::switches::kDisableSeccompFilterSandbox,
       ::switches::kDisableSeccompSandbox,
       ::switches::kDisableThreadedAnimation,
+      ::switches::kEnableCompositingForFixedPosition,
       ::switches::kEnableDevicePolicy,
       ::switches::kEnableGView,
       ::switches::kEnableHighDPIPDFPlugin,
       ::switches::kEnableLogging,
       ::switches::kEnableMobileSetupDialog,
       ::switches::kEnablePartialSwap,
       ::switches::kEnableUIReleaseFrontSurface,
       ::switches::kEnablePinch,
       ::switches::kEnableSmoothScrolling,
       ::switches::kEnableThreadedCompositing,
@@ skipping 436 matching lines @@
 bool LoginUtils::IsWhitelisted(const std::string& username) {
   CrosSettings* cros_settings = CrosSettings::Get();
   bool allow_new_user = false;
   cros_settings->GetBoolean(kAccountsPrefAllowNewUser, &allow_new_user);
   if (allow_new_user)
     return true;
   return cros_settings->FindEmailInList(kAccountsPrefUsers, username);
 }
 
 }  // namespace chromeos