Remove dependency of WebData on notifications

components/webdata/common/web_database.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 "components/webdata/common/web_database.h"
 
 #include <algorithm>
 
 #include "base/stl_util.h"
-#include "content/public/browser/notification_service.h"
 #include "sql/statement.h"
 #include "sql/transaction.h"
 
 // Current version number.  Note: when changing the current version number,
 // corresponding changes must happen in the unit tests, and new migration test
 // added.  See |WebDatabaseMigrationTest::kCurrentTestedVersionNumber|.
 // static
 const int WebDatabase::kCurrentVersionNumber = 51;
 
 namespace {
@@ skipping 42 matching lines @@
 
 void WebDatabase::CommitTransaction() {
   db_.CommitTransaction();
 }
 
 sql::Connection* WebDatabase::GetSQLConnection() {
   return &db_;
 }
 
 sql::InitStatus WebDatabase::Init(const base::FilePath& db_name) {
-  // When running in unit tests, there is already a NotificationService object.
-  // Since only one can exist at a time per thread, check first.
-  if (!content::NotificationService::current())
-    notification_service_.reset(content::NotificationService::Create());
-
   db_.set_histogram_tag("Web");
 
   // We don't store that much data in the tables so use a small page size.
   // This provides a large benefit for empty tables (which is very likely with
   // the tables we create).
   db_.set_page_size(2048);
 
   // We shouldn't have much data and what access we currently have is quite
   // infrequent. So we go with a small cache size.
   db_.set_cache_size(32);
@@ skipping 76 matching lines @@
       if (!it->second->MigrateToVersion(next_version,
                                         &update_compatible_version)) {
         return FailedMigrationTo(next_version);
       }
 
       ChangeVersion(&meta_table_, next_version, update_compatible_version);
     }
   }
   return sql::INIT_OK;
 }