[Sync] Return nullptr for OpenTabsUIDelegate when PROXY_TABS is disabled.

chrome/browser/extensions/api/sessions/sessions_apitest.cc

 // Copyright 2013 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 <stddef.h>
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/macros.h"
@@ skipping 199 matching lines @@
   if (!base::PathExists(path))
     CHECK(base::CreateDirectory(path));
   Profile* profile =
       Profile::CreateProfile(path, NULL, Profile::CREATE_MODE_SYNCHRONOUS);
   profile_manager->RegisterTestingProfile(profile, true, false);
   browser_sync::ProfileSyncServiceMock* service =
       static_cast<browser_sync::ProfileSyncServiceMock*>(
           ProfileSyncServiceFactory::GetInstance()->SetTestingFactoryAndUse(
               profile, &ExtensionSessionsTest::BuildProfileSyncService));
 
-  syncer::ModelTypeSet preferred_types;
-  preferred_types.Put(syncer::SESSIONS);
+  syncer::ModelTypeSet preferred_types(syncer::SESSIONS, syncer::PROXY_TABS);
   GoogleServiceAuthError no_error(GoogleServiceAuthError::NONE);
   ON_CALL(*service, IsDataTypeControllerRunning(syncer::SESSIONS))
       .WillByDefault(testing::Return(true));
+  ON_CALL(*service, IsDataTypeControllerRunning(syncer::PROXY_TABS))
+      .WillByDefault(testing::Return(true));
   ON_CALL(*service, GetRegisteredDataTypes())
       .WillByDefault(testing::Return(syncer::UserTypes()));
   ON_CALL(*service, GetPreferredDataTypes()).WillByDefault(
       testing::Return(preferred_types));
   EXPECT_CALL(*service, GetAuthError()).WillRepeatedly(
       testing::ReturnRef(no_error));
   ON_CALL(*service, GetActiveDataTypes()).WillByDefault(
       testing::Return(preferred_types));
 
   EXPECT_CALL(*service, AddObserver(testing::_)).Times(testing::AnyNumber());
@@ skipping 144 matching lines @@
   EXPECT_EQ(0u, sessions->GetSize());
 }
 
 // http://crbug.com/251199
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DISABLED_SessionsApis) {
   ASSERT_TRUE(RunExtensionSubtest("sessions",
                                   "sessions.html")) << message_;
 }
 
 }  // namespace extensions