Create new directory for budget_service

chrome/browser/push_messaging/background_budget_service.h

-// Copyright 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_PUSH_MESSAGING_BACKGROUND_BUDGET_SERVICE_H_
-#define CHROME_BROWSER_PUSH_MESSAGING_BACKGROUND_BUDGET_SERVICE_H_
-
-#include <memory>
-#include <string>
-
-#include "base/gtest_prod_util.h"
-#include "components/keyed_service/core/keyed_service.h"
-#include "url/gurl.h"
-
-class Profile;
-
-namespace base {
-class Clock;
-}
-
-namespace user_prefs {
-class PrefRegistrySyncable;
-}
-
-// A budget service to help Chrome decide how much background work a service
-// worker should be able to do on behalf of the user. The budget is calculated
-// based on the Site Engagment Score and is consumed when a service worker does
-// background work on behalf of the user.
-class BackgroundBudgetService : public KeyedService {
- public:
-  explicit BackgroundBudgetService(Profile* profile);
-  ~BackgroundBudgetService() override;
-
-  static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
-
-  enum class CostType {
-    // The cost of silencing a push message.
-    SILENT_PUSH = 0,
-  };
-
-  // Query for the base cost for any background processing.
-  static double GetCost(CostType type);
-
-  // Get the budget associated with the origin. This is returned as the double
-  // budget. Budget will be a value between 0.0 and
-  // SiteEngagementScore::kMaxPoints.
-  double GetBudget(const GURL& origin);
-
-  // Store the budget associated with the origin. Budget should be a value
-  // between 0.0 and SiteEngagementScore::kMaxPoints.
-  void StoreBudget(const GURL& origin, double budget);
-
- private:
-  friend class BackgroundBudgetServiceTest;
-
-  // Used to allow tests to fast forward/reverse time.
-  void SetClockForTesting(std::unique_ptr<base::Clock> clock);
-
-  // The clock used to vend times.
-  std::unique_ptr<base::Clock> clock_;
-
-  Profile* profile_;
-  DISALLOW_COPY_AND_ASSIGN(BackgroundBudgetService);
-};
-
-#endif  // CHROME_BROWSER_PUSH_MESSAGING_BACKGROUND_BUDGET_SERVICE_H_