Create meta table atomically.

chrome/browser/history/history_database.h

 // 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.
 
 #ifndef CHROME_BROWSER_HISTORY_HISTORY_DATABASE_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_DATABASE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 129 matching lines @@
   virtual base::Time GetEarlyExpirationThreshold();
   virtual void UpdateEarlyExpirationThreshold(base::Time threshold);
 
  private:
   friend class InMemoryURLIndexTest;
   FRIEND_TEST_ALL_PREFIXES(IconMappingMigrationTest, TestIconMappingMigration);
 
   // Overridden from URLDatabase:
   virtual sql::Connection& GetDB() OVERRIDE;
 
+  // Overridden from DownloadDatabase:
+  virtual sql::MetaTable& GetMetaTable() OVERRIDE;
+
   // Migration -----------------------------------------------------------------
 
   // Makes sure the version is up-to-date, updating if necessary. If the
   // database is too old to migrate, the user will be notified. In this case, or
   // for other errors, false will be returned. True means it is up-to-date and
   // ready for use.
   //
   // This assumes it is called from the init function inside a transaction. It
   // may commit the transaction and start a new one if migration requires it.
   sql::InitStatus EnsureCurrentVersion(const FilePath& tmp_bookmarks_path);
@@ skipping 13 matching lines @@
 
   // See the getters above.
   bool needs_version_17_migration_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryDatabase);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_DATABASE_H_