Reland 2:Geolocation: move from content/browser to device/

content/browser/geolocation/wifi_polling_policy.h

-// Copyright 2013 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 CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_
-#define CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_
-
-#include "base/macros.h"
-
-namespace content {
-
-// Allows sharing and mocking of the update polling policy function.
-class WifiPollingPolicy {
- public:
-  WifiPollingPolicy() {}
-  virtual ~WifiPollingPolicy() {}
-  // Calculates the new polling interval for wiFi scans, given the previous
-  // interval and whether the last scan produced new results.
-  virtual void UpdatePollingInterval(bool scan_results_differ) = 0;
-  virtual int PollingInterval() = 0;
-  virtual int NoWifiInterval() = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(WifiPollingPolicy);
-};
-
-// Generic polling policy, constants are compile-time parameterized to allow
-// tuning on a per-platform basis.
-template<int DEFAULT_INTERVAL,
-         int NO_CHANGE_INTERVAL,
-         int TWO_NO_CHANGE_INTERVAL,
-         int NO_WIFI_INTERVAL>
-class GenericWifiPollingPolicy : public WifiPollingPolicy {
- public:
-  GenericWifiPollingPolicy() : polling_interval_(DEFAULT_INTERVAL) {}
-  // WifiPollingPolicy
-  void UpdatePollingInterval(bool scan_results_differ) override {
-    if (scan_results_differ) {
-      polling_interval_ = DEFAULT_INTERVAL;
-    } else if (polling_interval_ == DEFAULT_INTERVAL) {
-      polling_interval_ = NO_CHANGE_INTERVAL;
-    } else {
-      DCHECK(polling_interval_ == NO_CHANGE_INTERVAL ||
-             polling_interval_ == TWO_NO_CHANGE_INTERVAL);
-      polling_interval_ = TWO_NO_CHANGE_INTERVAL;
-    }
-  }
-  int PollingInterval() override { return polling_interval_; }
-  int NoWifiInterval() override { return NO_WIFI_INTERVAL; }
-
- private:
-  int polling_interval_;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_