Enable webview-based sign-in to chrome.

components/signin/core/common/profile_management_switches.cc

 // Copyright 2014 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 "components/signin/core/common/profile_management_switches.h"
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "build/build_config.h"
 #include "components/signin/core/common/signin_switches.h"
@@ skipping 117 matching lines @@
   return GetProcessState() >= STATE_ACCOUNT_CONSISTENCY;
 }
 
 bool IsEnableWebBasedSignin() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
              switches::kEnableWebBasedSignin) &&
          !IsEnableWebviewBasedSignin();
 }
 
 bool IsEnableWebviewBasedSignin() {
-  return base::CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableWebviewBasedSignin);
+  // For now, the webview is enabled only for desktop.
+#if defined(OS_CHROMEOS)
+  return false;
+#else
+  return !base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableIframeBasedSignin);
+#endif
 }
 
 bool IsExtensionsMultiAccount() {
   return CheckFlag(switches::kExtensionsMultiAccount,
                    STATE_NEW_PROFILE_MANAGEMENT);
 }
 
 bool IsFastUserSwitching() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kFastUserSwitching);
@@ skipping 35 matching lines @@
   command_line->AppendSwitch(switches::kEnableNewProfileManagement);
   DCHECK(!command_line->HasSwitch(switches::kDisableNewProfileManagement));
 }
 
 void EnableAccountConsistencyForTesting(base::CommandLine* command_line) {
   command_line->AppendSwitch(switches::kEnableAccountConsistency);
   DCHECK(!command_line->HasSwitch(switches::kDisableAccountConsistency));
 }
 
 }  // namespace switches