[Sync] Add history delete directive type

chrome/browser/sync/profile_sync_service.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 "chrome/browser/sync/profile_sync_service.h"
 
 #include <cstddef>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 1082 matching lines @@
     browser_sync::user_selectable_type::AUTOFILL,
     browser_sync::user_selectable_type::BOOKMARKS,
     browser_sync::user_selectable_type::EXTENSIONS,
     browser_sync::user_selectable_type::PASSWORDS,
     browser_sync::user_selectable_type::PREFERENCES,
     browser_sync::user_selectable_type::SESSIONS,
     browser_sync::user_selectable_type::THEMES,
     browser_sync::user_selectable_type::TYPED_URLS
   };
 
-  COMPILE_ASSERT(17 == syncer::MODEL_TYPE_COUNT, UpdateCustomConfigHistogram);
+  COMPILE_ASSERT(18 == syncer::MODEL_TYPE_COUNT, UpdateCustomConfigHistogram);
   COMPILE_ASSERT(arraysize(model_types) ==
                  browser_sync::user_selectable_type::SELECTABLE_DATATYPE_COUNT,
                  UpdateCustomConfigHistogram);
   COMPILE_ASSERT(arraysize(model_types) == arraysize(user_selectable_types),
                  UpdateCustomConfigHistogram);
 
   if (!sync_everything) {
     const syncer::ModelTypeSet current_types = GetPreferredDataTypes();
     for (size_t i = 0; i < arraysize(model_types); ++i) {
       const syncer::ModelType type = model_types[i];
@@ skipping 678 matching lines @@
   // See http://stackoverflow.com/questions/6224121/is-new-this-myclass-undefined-behaviour-after-directly-calling-the-destru.
   ProfileSyncService* old_this = this;
   this->~ProfileSyncService();
   new(old_this) ProfileSyncService(
       new ProfileSyncComponentsFactoryImpl(profile,
                                            CommandLine::ForCurrentProcess()),
       profile,
       signin,
       behavior);
 }