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

content/browser/geolocation/network_location_provider.cc

Index: content/browser/geolocation/network_location_provider.cc
diff --git a/content/browser/geolocation/network_location_provider.cc b/content/browser/geolocation/network_location_provider.cc
deleted file mode 100644
index 0c6e6db4c74c94a275935c450ccc8782facf7228..0000000000000000000000000000000000000000
--- a/content/browser/geolocation/network_location_provider.cc
+++ /dev/null
@@ -1,273 +0,0 @@
-// Copyright (c) 2012 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/network_location_provider.h"
-
-#include "base/bind.h"
-#include "base/location.h"
-#include "base/single_thread_task_runner.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/threading/thread_task_runner_handle.h"
-#include "base/time/time.h"
-#include "content/public/browser/access_token_store.h"
-
-namespace content {
-namespace {
-// The maximum period of time we'll wait for a complete set of wifi data
-// before sending the request.
-const int kDataCompleteWaitSeconds = 2;
-}  // namespace
-
-// static
-const size_t NetworkLocationProvider::PositionCache::kMaximumSize = 10;
-
-NetworkLocationProvider::PositionCache::PositionCache() {}
-
-NetworkLocationProvider::PositionCache::~PositionCache() {}
-
-bool NetworkLocationProvider::PositionCache::CachePosition(
-    const WifiData& wifi_data,
-    const Geoposition& position) {
-  // Check that we can generate a valid key for the wifi data.
-  base::string16 key;
-  if (!MakeKey(wifi_data, &key)) {
-    return false;
-  }
-  // If the cache is full, remove the oldest entry.
-  if (cache_.size() == kMaximumSize) {
-    DCHECK(cache_age_list_.size() == kMaximumSize);
-    CacheAgeList::iterator oldest_entry = cache_age_list_.begin();
-    DCHECK(oldest_entry != cache_age_list_.end());
-    cache_.erase(*oldest_entry);
-    cache_age_list_.erase(oldest_entry);
-  }
-  DCHECK_LT(cache_.size(), kMaximumSize);
-  // Insert the position into the cache.
-  std::pair<CacheMap::iterator, bool> result =
-      cache_.insert(std::make_pair(key, position));
-  if (!result.second) {
-    NOTREACHED();  // We never try to add the same key twice.
-    CHECK_EQ(cache_.size(), cache_age_list_.size());
-    return false;
-  }
-  cache_age_list_.push_back(result.first);
-  DCHECK_EQ(cache_.size(), cache_age_list_.size());
-  return true;
-}
-
-// Searches for a cached position response for the current WiFi data. Returns
-// the cached position if available, nullptr otherwise.
-const Geoposition* NetworkLocationProvider::PositionCache::FindPosition(
-    const WifiData& wifi_data) {
-  base::string16 key;
-  if (!MakeKey(wifi_data, &key)) {
-    return nullptr;
-  }
-  CacheMap::const_iterator iter = cache_.find(key);
-  return iter == cache_.end() ? nullptr : &iter->second;
-}
-
-// Makes the key for the map of cached positions, using the available data.
-// Returns true if a good key was generated, false otherwise.
-//
-// static
-bool NetworkLocationProvider::PositionCache::MakeKey(
-    const WifiData& wifi_data,
-    base::string16* key) {
-  // Currently we use only WiFi data and base the key only on the MAC addresses.
-  DCHECK(key);
-  key->clear();
-  const size_t kCharsPerMacAddress = 6 * 3 + 1;  // e.g. "11:22:33:44:55:66|"
-  key->reserve(wifi_data.access_point_data.size() * kCharsPerMacAddress);
-  const base::string16 separator(base::ASCIIToUTF16("|"));
-  for (const auto& access_point_data : wifi_data.access_point_data) {
-    *key += separator;
-    *key += access_point_data.mac_address;
-    *key += separator;
-  }
-  // If the key is the empty string, return false, as we don't want to cache a
-  // position for such data.
-  return !key->empty();
-}
-
-// NetworkLocationProvider factory function
-LocationProviderBase* NewNetworkLocationProvider(
-    const scoped_refptr<AccessTokenStore>& access_token_store,
-    const scoped_refptr<net::URLRequestContextGetter>& context,
-    const GURL& url,
-    const base::string16& access_token) {
-  return new NetworkLocationProvider(
-      access_token_store, context, url, access_token);
-}
-
-// NetworkLocationProvider
-NetworkLocationProvider::NetworkLocationProvider(
-    const scoped_refptr<AccessTokenStore>& access_token_store,
-    const scoped_refptr<net::URLRequestContextGetter>& url_context_getter,
-    const GURL& url,
-    const base::string16& access_token)
-    : access_token_store_(access_token_store),
-      wifi_data_provider_manager_(nullptr),
-      wifi_data_update_callback_(
-          base::Bind(&NetworkLocationProvider::OnWifiDataUpdate,
-                     base::Unretained(this))),
-      is_wifi_data_complete_(false),
-      access_token_(access_token),
-      is_permission_granted_(false),
-      is_new_data_available_(false),
-      position_cache_(new PositionCache),
-      weak_factory_(this) {
-  request_.reset(new NetworkLocationRequest(
-      url_context_getter,
-      url,
-      base::Bind(&NetworkLocationProvider::OnLocationResponse,
-                 base::Unretained(this))));
-}
-
-NetworkLocationProvider::~NetworkLocationProvider() {
-  StopProvider();
-}
-
-// LocationProvider implementation
-void NetworkLocationProvider::GetPosition(Geoposition* position) {
-  DCHECK(position);
-  *position = position_;
-}
-
-void NetworkLocationProvider::RequestRefresh() {
-  // TODO(joth): When called via the public (base class) interface, this should
-  // poke each data provider to get them to expedite their next scan.
-  // Whilst in the delayed start, only send request if all data is ready.
-  // TODO(mcasas): consider not using HasWeakPtrs() https://crbug.com/629158.
-  if (!weak_factory_.HasWeakPtrs() || is_wifi_data_complete_) {
-    RequestPosition();
-  }
-}
-
-void NetworkLocationProvider::OnPermissionGranted() {
-  const bool was_permission_granted = is_permission_granted_;
-  is_permission_granted_ = true;
-  if (!was_permission_granted && IsStarted()) {
-    RequestRefresh();
-  }
-}
-
-void NetworkLocationProvider::OnWifiDataUpdate() {
-  DCHECK(wifi_data_provider_manager_);
-  is_wifi_data_complete_ = wifi_data_provider_manager_->GetData(&wifi_data_);
-  OnWifiDataUpdated();
-}
-
-void NetworkLocationProvider::OnLocationResponse(
-    const Geoposition& position,
-    bool server_error,
-    const base::string16& access_token,
-    const WifiData& wifi_data) {
-  DCHECK(CalledOnValidThread());
-  // Record the position and update our cache.
-  position_ = position;
-  if (position.Validate()) {
-    position_cache_->CachePosition(wifi_data, position);
-  }
-
-  // Record access_token if it's set.
-  if (!access_token.empty() && access_token_ != access_token) {
-    access_token_ = access_token;
-    access_token_store_->SaveAccessToken(request_->url(), access_token);
-  }
-
-  // Let listeners know that we now have a position available.
-  NotifyCallback(position_);
-}
-
-bool NetworkLocationProvider::StartProvider(bool high_accuracy) {
-  DCHECK(CalledOnValidThread());
-  if (IsStarted())
-    return true;
-  DCHECK(!wifi_data_provider_manager_);
-  if (!request_->url().is_valid()) {
-    LOG(WARNING) << "StartProvider() : Failed, Bad URL: "
-                 << request_->url().possibly_invalid_spec();
-    return false;
-  }
-
-  // Registers a callback with the data provider. The first call to Register
-  // will create a singleton data provider and it will be deleted when the last
-  // callback is removed with Unregister.
-  wifi_data_provider_manager_ =
-      WifiDataProviderManager::Register(&wifi_data_update_callback_);
-
-  base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
-      FROM_HERE, base::Bind(&NetworkLocationProvider::RequestPosition,
-                            weak_factory_.GetWeakPtr()),
-      base::TimeDelta::FromSeconds(kDataCompleteWaitSeconds));
-  // Get the wifi data.
-  is_wifi_data_complete_ = wifi_data_provider_manager_->GetData(&wifi_data_);
-  if (is_wifi_data_complete_)
-    OnWifiDataUpdated();
-  return true;
-}
-
-void NetworkLocationProvider::OnWifiDataUpdated() {
-  DCHECK(CalledOnValidThread());
-  wifi_timestamp_ = base::Time::Now();
-
-  is_new_data_available_ = is_wifi_data_complete_;
-  RequestRefresh();
-}
-
-void NetworkLocationProvider::StopProvider() {
-  DCHECK(CalledOnValidThread());
-  if (IsStarted()) {
-    wifi_data_provider_manager_->Unregister(&wifi_data_update_callback_);
-  }
-  wifi_data_provider_manager_ = nullptr;
-  weak_factory_.InvalidateWeakPtrs();
-}
-
-// Other methods
-void NetworkLocationProvider::RequestPosition() {
-  DCHECK(CalledOnValidThread());
-  if (!is_new_data_available_)
-    return;
-
-  const Geoposition* cached_position =
-      position_cache_->FindPosition(wifi_data_);
-  DCHECK(!wifi_timestamp_.is_null())
-      << "Timestamp must be set before looking up position";
-  if (cached_position) {
-    DCHECK(cached_position->Validate());
-    // Record the position and update its timestamp.
-    position_ = *cached_position;
-    // The timestamp of a position fix is determined by the timestamp
-    // of the source data update. (The value of position_.timestamp from
-    // the cache could be from weeks ago!)
-    position_.timestamp = wifi_timestamp_;
-    is_new_data_available_ = false;
-    // Let listeners know that we now have a position available.
-    NotifyCallback(position_);
-    return;
-  }
-  // Don't send network requests until authorized. http://crbug.com/39171
-  if (!is_permission_granted_)
-    return;
-
-  weak_factory_.InvalidateWeakPtrs();
-  is_new_data_available_ = false;
-
-  // TODO(joth): Rather than cancel pending requests, we should create a new
-  // NetworkLocationRequest for each and hold a set of pending requests.
-  if (request_->is_request_pending()) {
-    DVLOG(1) << "NetworkLocationProvider - pre-empting pending network request "
-                "with new data. Wifi APs: "
-             << wifi_data_.access_point_data.size();
-  }
-  request_->MakeRequest(access_token_, wifi_data_, wifi_timestamp_);
-}
-
-bool NetworkLocationProvider::IsStarted() const {
-  return wifi_data_provider_manager_ != nullptr;
-}
-
-}  // namespace content