Refactoring AutocompleteActionPredictor Database.

chrome/browser/predictors/predictor_database_factory.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_PREDICTORS_PREDICTOR_DATABASE_FACTORY_H_
+#define CHROME_BROWSER_PREDICTORS_PREDICTOR_DATABASE_FACTORY_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/memory/singleton.h"
+#include "chrome/browser/profiles/profile_keyed_service_factory.h"
+
+namespace predictors {
+
+class PredictorDatabase;
+
+// Singleton that owns the PredictorDatabases and associates them with

[dominich, 2012/05/08 20:35:28]

I don't remember how this works - what is the story for incognito with this
setup?

[Shishir, 2012/05/08 21:49:03]

By default in incognito the factory will return NULL when asked for the service.

+// Profiles.
+class PredictorDatabaseFactory : public ProfileKeyedServiceFactory {
+ public:
+  static PredictorDatabase* GetForProfile(Profile* profile);
+
+  static PredictorDatabaseFactory* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<PredictorDatabaseFactory>;
+
+  PredictorDatabaseFactory();
+  virtual ~PredictorDatabaseFactory();
+
+  // ProfileKeyedServiceFactory:
+  virtual ProfileKeyedService* BuildServiceInstanceFor(
+      Profile* profile) const OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(PredictorDatabaseFactory);
+};
+
+}  // namespace predictors
+
+#endif  // CHROME_BROWSER_PREDICTORS_PREDICTOR_DATABASE_FACTORY_H_