Revert of Reland: Geolocation: move from content/browser to device/

content/browser/geolocation/geolocation_service_impl.cc

Index: content/browser/geolocation/geolocation_service_impl.cc
diff --git a/content/browser/geolocation/geolocation_service_impl.cc b/content/browser/geolocation/geolocation_service_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e05dda47cdc3f53fe1f4b7abd2202b80126e35e5
--- /dev/null
+++ b/content/browser/geolocation/geolocation_service_impl.cc
@@ -0,0 +1,195 @@
+// 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 "content/browser/geolocation/geolocation_service_impl.h"
+
+#include <utility>
+
+#include "base/bind.h"
+#include "base/metrics/histogram.h"
+#include "content/browser/geolocation/geolocation_service_context.h"
+
+namespace content {
+
+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 content