Enable web-based sign in flow by default. Can use command line argument

chrome/browser/ui/sync/one_click_signin_helper_unittest.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 "base/command_line.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/content_settings/cookie_settings.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 197 matching lines @@
   content::TestBrowserThread ui_thread_;
 
   DISALLOW_COPY_AND_ASSIGN(OneClickSigninHelperTest);
 };
 
 OneClickSigninHelperTest::OneClickSigninHelperTest()
     : ui_thread_(content::BrowserThread::UI, &message_loop_) {
 }
 
 void OneClickSigninHelperTest::SetUp() {
-  // Make sure web flow is enabled for tests.
-  CommandLine::ForCurrentProcess()->AppendSwitch(
-      switches::kUseWebBasedSigninFlow);
-
   TestingProfile* testing_profile = new TestingProfile();
   browser_context_.reset(testing_profile);
 
   content::RenderViewHostTestHarness::SetUp();
 }
 
 void OneClickSigninHelperTest::CreateSigninManager(
     bool use_incognito,
     const std::string& username) {
   TestingProfile* testing_profile = static_cast<TestingProfile*>(
@@ skipping 387 matching lines @@
                 valid_gaia_url_, "", &request_, io_data.get()));
 }
 
 TEST_F(OneClickSigninHelperIOTest, CanOfferOnIOThreadNoSigninCookies) {
   AllowSigninCookies(false);
   scoped_ptr<TestProfileIOData> io_data(CreateTestProfileIOData(false));
   EXPECT_EQ(OneClickSigninHelper::DONT_OFFER,
             OneClickSigninHelper::CanOfferOnIOThreadImpl(
                 valid_gaia_url_, "", &request_, io_data.get()));
 }