Revert 76228 - Move core pieces of geolocation from chrome to content.This is...

content/browser/geolocation/device_data_provider.cc

-// Copyright (c) 2010 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.
-
-#include "content/browser/geolocation/device_data_provider.h"
-
-namespace {
-
-bool CellDataMatches(const CellData &data1, const CellData &data2) {
-  return data1.Matches(data2);
-}
-
-}  // namespace
-
-CellData::CellData()
-    : cell_id(kint32min),
-      location_area_code(kint32min),
-      mobile_network_code(kint32min),
-      mobile_country_code(kint32min),
-      radio_signal_strength(kint32min),
-      timing_advance(kint32min) {
-}
-
-RadioData::RadioData()
-    : home_mobile_network_code(kint32min),
-      home_mobile_country_code(kint32min),
-      radio_type(RADIO_TYPE_UNKNOWN) {
-}
-
-RadioData::~RadioData() {}
-
-bool RadioData::Matches(const RadioData &other) const {
-  if (cell_data.size() != other.cell_data.size()) {
-    return false;
-  }
-  if (!std::equal(cell_data.begin(), cell_data.end(), other.cell_data.begin(),
-                  CellDataMatches)) {
-    return false;
-  }
-  return device_id == other.device_id &&
-         home_mobile_network_code == other.home_mobile_network_code &&
-         home_mobile_country_code == other.home_mobile_country_code &&
-         radio_type == other.radio_type &&
-         carrier == other.carrier;
-}
-
-AccessPointData::AccessPointData()
-    : radio_signal_strength(kint32min),
-      channel(kint32min),
-      signal_to_noise(kint32min) {
-}
-
-AccessPointData::~AccessPointData() {}
-
-WifiData::WifiData() {}
-
-WifiData::~WifiData() {}
-
-bool WifiData::DiffersSignificantly(const WifiData& other) const {
-  // More than 4 or 50% of access points added or removed is significant.
-  static const size_t kMinChangedAccessPoints = 4;
-  const size_t min_ap_count =
-      std::min(access_point_data.size(), other.access_point_data.size());
-  const size_t max_ap_count =
-      std::max(access_point_data.size(), other.access_point_data.size());
-  const size_t difference_threadhold = std::min(kMinChangedAccessPoints,
-                                                min_ap_count / 2);
-  if (max_ap_count > min_ap_count + difference_threadhold)
-    return true;
-  // Compute size of interesction of old and new sets.
-  size_t num_common = 0;
-  for (AccessPointDataSet::const_iterator iter = access_point_data.begin();
-       iter != access_point_data.end();
-       iter++) {
-    if (other.access_point_data.find(*iter) !=
-        other.access_point_data.end()) {
-      ++num_common;
-    }
-  }
-  DCHECK(num_common <= min_ap_count);
-
-  // Test how many have changed.
-  return max_ap_count > num_common + difference_threadhold;
-}
-
-GatewayData::GatewayData() {}
-
-GatewayData::~GatewayData() {}
-
-bool GatewayData::DiffersSignificantly(const GatewayData& other) const {
-  // Any change is significant.
-  if (this->router_data.size() != other.router_data.size())
-    return true;
-  RouterDataSet::const_iterator iter1 = router_data.begin();
-  RouterDataSet::const_iterator iter2 = other.router_data.begin();
-  while (iter1 != router_data.end()) {
-    if (iter1->mac_address != iter2->mac_address) {
-      // There is a difference between the sets of routers.
-      return true;
-    }
-    ++iter1;
-    ++iter2;
-  }
-  return false;
-}