Revert of Reland: Geolocation: move from content/browser to device/ (patchset #2 id:20001 of https:…

device/geolocation/geolocation_service_impl.cc

-// Copyright 2014 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 "device/geolocation/geolocation_service_impl.h"
-
-#include <utility>
-
-#include "base/bind.h"
-#include "base/metrics/histogram.h"
-#include "device/geolocation/geolocation_service_context.h"
-
-namespace device {
-
-namespace {
-
-// Geoposition error codes for reporting in UMA.
-enum GeopositionErrorCode {
-  // NOTE: Do not renumber these as that would confuse interpretation of
-  // previously logged data. When making changes, also update the enum list
-  // in tools/metrics/histograms/histograms.xml to keep it in sync.
-
-  // There was no error.
-  GEOPOSITION_ERROR_CODE_NONE = 0,
-
-  // User denied use of geolocation.
-  GEOPOSITION_ERROR_CODE_PERMISSION_DENIED = 1,
-
-  // Geoposition could not be determined.
-  GEOPOSITION_ERROR_CODE_POSITION_UNAVAILABLE = 2,
-
-  // Timeout.
-  GEOPOSITION_ERROR_CODE_TIMEOUT = 3,
-
-  // NOTE: Add entries only immediately above this line.
-  GEOPOSITION_ERROR_CODE_COUNT = 4
-};
-
-void RecordGeopositionErrorCode(Geoposition::ErrorCode error_code) {
-  GeopositionErrorCode code = GEOPOSITION_ERROR_CODE_NONE;
-  switch (error_code) {
-    case Geoposition::ERROR_CODE_NONE:
-      code = GEOPOSITION_ERROR_CODE_NONE;
-      break;
-    case Geoposition::ERROR_CODE_PERMISSION_DENIED:
-      code = GEOPOSITION_ERROR_CODE_PERMISSION_DENIED;
-      break;
-    case Geoposition::ERROR_CODE_POSITION_UNAVAILABLE:
-      code = GEOPOSITION_ERROR_CODE_POSITION_UNAVAILABLE;
-      break;
-    case Geoposition::ERROR_CODE_TIMEOUT:
-      code = GEOPOSITION_ERROR_CODE_TIMEOUT;
-      break;
-  }
-  UMA_HISTOGRAM_ENUMERATION("Geolocation.LocationUpdate.ErrorCode",
-                            code,
-                            GEOPOSITION_ERROR_CODE_COUNT);
-}
-
-}  // namespace
-
-GeolocationServiceImpl::GeolocationServiceImpl(
-    mojo::InterfaceRequest<GeolocationService> request,
-    GeolocationServiceContext* context,
-    const base::Closure& update_callback)
-    : binding_(this, std::move(request)),
-      context_(context),
-      update_callback_(update_callback),
-      high_accuracy_(false),
-      has_position_to_report_(false) {
-  DCHECK(context_);
-  binding_.set_connection_error_handler(
-      base::Bind(&GeolocationServiceImpl::OnConnectionError,
-                 base::Unretained(this)));
-}
-
-GeolocationServiceImpl::~GeolocationServiceImpl() {
-  // Make sure to respond to any pending callback even without a valid position.
-  if (!position_callback_.is_null()) {
-    if (!current_position_.valid) {
-      current_position_.error_code = blink::mojom::Geoposition::ErrorCode(
-          GEOPOSITION_ERROR_CODE_POSITION_UNAVAILABLE);
-      current_position_.error_message = mojo::String("");
-    }
-    ReportCurrentPosition();
-  }
-}
-
-void GeolocationServiceImpl::PauseUpdates() {
-  geolocation_subscription_.reset();
-}
-
-void GeolocationServiceImpl::ResumeUpdates() {
-  if (position_override_.Validate()) {
-    OnLocationUpdate(position_override_);
-    return;
-  }
-
-  StartListeningForUpdates();
-}
-
-void GeolocationServiceImpl::StartListeningForUpdates() {
-  geolocation_subscription_ =
-      GeolocationProvider::GetInstance()->AddLocationUpdateCallback(
-          base::Bind(&GeolocationServiceImpl::OnLocationUpdate,
-                     base::Unretained(this)),
-          high_accuracy_);
-}
-
-void GeolocationServiceImpl::SetHighAccuracy(bool high_accuracy) {
-  UMA_HISTOGRAM_BOOLEAN(
-      "Geolocation.GeolocationDispatcherHostImpl.EnableHighAccuracy",
-      high_accuracy);
-  high_accuracy_ = high_accuracy;
-
-  if (position_override_.Validate()) {
-    OnLocationUpdate(position_override_);
-    return;
-  }
-
-  StartListeningForUpdates();
-}
-
-void GeolocationServiceImpl::QueryNextPosition(
-    const QueryNextPositionCallback& callback) {
-  if (!position_callback_.is_null()) {
-    DVLOG(1) << "Overlapped call to QueryNextPosition!";
-    OnConnectionError();  // Simulate a connection error.
-    return;
-  }
-
-  position_callback_ = callback;
-
-  if (has_position_to_report_)
-    ReportCurrentPosition();
-}
-
-void GeolocationServiceImpl::SetOverride(const Geoposition& position) {
-  position_override_ = position;
-  if (!position_override_.Validate()) {
-    ResumeUpdates();
-  }
-
-  geolocation_subscription_.reset();
-
-  OnLocationUpdate(position_override_);
-}
-
-void GeolocationServiceImpl::ClearOverride() {
-  position_override_ = Geoposition();
-  StartListeningForUpdates();
-}
-
-void GeolocationServiceImpl::OnConnectionError() {
-  context_->ServiceHadConnectionError(this);
-
-  // The above call deleted this instance, so the only safe thing to do is
-  // return.
-}
-
-void GeolocationServiceImpl::OnLocationUpdate(const Geoposition& position) {
-  RecordGeopositionErrorCode(position.error_code);
-  DCHECK(context_);
-
-  if (context_->paused())
-    return;
-
-  update_callback_.Run();
-
-  current_position_.valid = position.Validate();
-  current_position_.latitude = position.latitude;
-  current_position_.longitude = position.longitude;
-  current_position_.altitude = position.altitude;
-  current_position_.accuracy = position.accuracy;
-  current_position_.altitude_accuracy = position.altitude_accuracy;
-  current_position_.heading = position.heading;
-  current_position_.speed = position.speed;
-  current_position_.timestamp = position.timestamp.ToDoubleT();
-  current_position_.error_code =
-      blink::mojom::Geoposition::ErrorCode(position.error_code);
-  current_position_.error_message = position.error_message;
-
-  has_position_to_report_ = true;
-
-  if (!position_callback_.is_null())
-    ReportCurrentPosition();
-}
-
-void GeolocationServiceImpl::ReportCurrentPosition() {
-  position_callback_.Run(current_position_.Clone());
-  position_callback_.Reset();
-  has_position_to_report_ = false;
-}
-
-}  // namespace device