Support Sync following Gaia OAuth authentication

chrome/browser/sync/sync_setup_wizard.cc

Index: chrome/browser/sync/sync_setup_wizard.cc
diff --git a/chrome/browser/sync/sync_setup_wizard.cc b/chrome/browser/sync/sync_setup_wizard.cc
index 61113fdf962a9c91d0d5daebf42573de46f48bc8..614b7c275a306db344e461d0a8a9129f51495134 100644
--- a/chrome/browser/sync/sync_setup_wizard.cc
+++ b/chrome/browser/sync/sync_setup_wizard.cc
@@ -91,11 +91,19 @@ bool SyncSetupWizard::IsVisible() const {
          flow_container_->get_flow()->IsAttached();
 }
 
+// Returns true iff Sync is using OAuth-based authentication.  See also
+// GetLoginState().
+// static
+bool SyncSetupWizard::IsUsingOAuth() {
+  return CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableSyncOAuth);
+}
+
 // static
 SyncSetupWizard::State SyncSetupWizard::GetLoginState() {
-  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableSyncOAuth))
-    return SyncSetupWizard::OAUTH_LOGIN;
-  return SyncSetupWizard::GAIA_LOGIN;
+  return IsUsingOAuth() ?
+      SyncSetupWizard::OAUTH_LOGIN :
+      SyncSetupWizard::GAIA_LOGIN;
 }
 
 void SyncSetupWizard::Focus() {