Revert "Revert 182527" ([Sync] Make SESSIONS an implicit type)

chrome/browser/sync/profile_sync_components_factory_impl_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 <vector>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
@@ skipping 30 matching lines @@
     datatypes.push_back(syncer::BOOKMARKS);
 #if defined(OS_LINUX) || defined(OS_WIN) || defined(OS_CHROMEOS)
     datatypes.push_back(syncer::DICTIONARY);
 #endif
     datatypes.push_back(syncer::EXTENSIONS);
     datatypes.push_back(syncer::EXTENSION_SETTINGS);
     datatypes.push_back(syncer::PASSWORDS);
     datatypes.push_back(syncer::PREFERENCES);
     datatypes.push_back(syncer::SEARCH_ENGINES);
     datatypes.push_back(syncer::SESSIONS);
+    datatypes.push_back(syncer::PROXY_TABS);
     datatypes.push_back(syncer::THEMES);
     datatypes.push_back(syncer::TYPED_URLS);
     return datatypes;
   }
 
   // Returns the number of default datatypes.
   static size_t DefaultDatatypesCount() {
     return DefaultDatatypes().size();
   }
 
@@ skipping 87 matching lines @@
 
 TEST_F(ProfileSyncComponentsFactoryImplTest, CreatePSSDisableAutofillProfile) {
   TestSwitchDisablesType(switches::kDisableSyncAutofillProfile,
                          syncer::AUTOFILL_PROFILE);
 }
 
 TEST_F(ProfileSyncComponentsFactoryImplTest, CreatePSSDisablePasswords) {
   TestSwitchDisablesType(switches::kDisableSyncPasswords,
                          syncer::PASSWORDS);
 }