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

content/browser/geolocation/wifi_data.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_DATA_H_
-#define CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_H_
-
-#include <set>
-
-#include "base/strings/string16.h"
-#include "content/common/content_export.h"
-
-namespace content {
-
-// Wifi data relating to a single access point.
-struct CONTENT_EXPORT AccessPointData {
-  AccessPointData();
-  ~AccessPointData();
-
-  // MAC address, formatted as per MacAddressAsString16.
-  base::string16 mac_address;
-  int radio_signal_strength;  // Measured in dBm
-  int channel;
-  int signal_to_noise;  // Ratio in dB
-  base::string16 ssid;   // Network identifier
-};
-
-// This is to allow AccessPointData to be used in std::set. We order
-// lexicographically by MAC address.
-struct AccessPointDataLess {
-  bool operator()(const AccessPointData& data1,
-                  const AccessPointData& data2) const {
-    return data1.mac_address < data2.mac_address;
-  }
-};
-
-// All data for wifi.
-struct CONTENT_EXPORT WifiData {
-  WifiData();
-  WifiData(const WifiData& other);
-  ~WifiData();
-
-  // Determines whether a new set of WiFi data differs significantly from this.
-  bool DiffersSignificantly(const WifiData& other) const;
-
-  // Store access points as a set, sorted by MAC address. This allows quick
-  // comparison of sets for detecting changes and for caching.
-  typedef std::set<AccessPointData, AccessPointDataLess> AccessPointDataSet;
-  AccessPointDataSet access_point_data;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_GEOLOCATION_WIFI_DATA_H_