Make profile statistics tasks inspectable by tests

chrome/browser/profiles/profile_statistics_factory.h

+// Copyright (c) 2016 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_PROFILES_PROFILE_STATISTICS_FACTORY_H_
+#define CHROME_BROWSER_PROFILES_PROFILE_STATISTICS_FACTORY_H_
+
+#include "base/macros.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+namespace base {
+template <typename T> struct DefaultSingletonTraits;
+}
+
+class Profile;
+class ProfileStatistics;
+
+// Singleton that owns all ProfileStatistics and associates them with Profiles.
+class ProfileStatisticsFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  static ProfileStatistics* GetForProfile(Profile* profile);
+
+  static ProfileStatisticsFactory* GetInstance();
+
+ private:
+  friend struct base::DefaultSingletonTraits<ProfileStatisticsFactory>;
+
+  ProfileStatisticsFactory();
+
+  // BrowserContextKeyedServiceFactory:
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(ProfileStatisticsFactory);
+};
+
+#endif  // CHROME_BROWSER_PROFILES_PROFILE_STATISTICS_FACTORY_H_