Add m-esr52 at 52.6.0

1 files changed, 706 insertions, 0 deletions

diff --git a/dom/system/gonk/GonkGPSGeolocationProvider.cpp b/dom/system/gonk/GonkGPSGeolocationProvider.cpp
new file mode 100644
index 000000000..9ce6ce2e5
--- /dev/null
+++ b/dom/system/gonk/GonkGPSGeolocationProvider.cpp
@@ -0,0 +1,706 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* Copyright 2012 Mozilla Foundation and Mozilla contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "GonkGPSGeolocationProvider.h"
+
+#include <cmath>
+#include <pthread.h>
+#include <hardware/gps.h>
+
+#include "base/task.h"
+#include "GeolocationUtil.h"
+#include "mozstumbler/MozStumbler.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/Services.h"
+#include "nsContentUtils.h"
+#include "nsGeoPosition.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsINetworkInterface.h"
+#include "nsIObserverService.h"
+#include "nsJSUtils.h"
+#include "nsPrintfCString.h"
+#include "nsServiceManagerUtils.h"
+#include "nsThreadUtils.h"
+#include "prtime.h"
+#include "mozilla/dom/BindingUtils.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/SettingChangeNotificationBinding.h"
+
+#ifdef AGPS_TYPE_INVALID
+#define AGPS_HAVE_DUAL_APN
+#endif
+
+#define FLUSH_AIDE_DATA 0
+
+#undef LOG
+#undef ERR
+#undef DBG
+#define LOG(args...)  __android_log_print(ANDROID_LOG_INFO,  "GonkGPSGeolocationProvider", ## args)
+#define ERR(args...)  __android_log_print(ANDROID_LOG_ERROR, "GonkGPSGeolocationProvider", ## args)
+#define DBG(args...)  __android_log_print(ANDROID_LOG_DEBUG, "GonkGPSGeolocationProvider" , ## args)
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+static const int kDefaultPeriod = 1000; // ms
+static bool gDebug_isLoggingEnabled = false;
+static bool gDebug_isGPSLocationIgnored = false;
+static const char* kMozSettingsChangedTopic = "mozsettings-changed";
+// Both of these settings can be toggled in the Gaia Developer settings screen.
+static const char* kSettingDebugEnabled = "geolocation.debugging.enabled";
+static const char* kSettingDebugGpsIgnored = "geolocation.debugging.gps-locations-ignored";
+
+// While most methods of GonkGPSGeolocationProvider should only be
+// called from main thread, we deliberately put the Init and ShutdownGPS
+// methods off main thread to avoid blocking.
+NS_IMPL_ISUPPORTS(GonkGPSGeolocationProvider,
+                  nsIGeolocationProvider,
+                  nsIObserver,
+                  nsISettingsServiceCallback)
+
+/* static */ GonkGPSGeolocationProvider* GonkGPSGeolocationProvider::sSingleton = nullptr;
+GpsCallbacks GonkGPSGeolocationProvider::mCallbacks;
+
+
+void
+GonkGPSGeolocationProvider::LocationCallback(GpsLocation* location)
+{
+  if (gDebug_isGPSLocationIgnored) {
+    return;
+  }
+
+  class UpdateLocationEvent : public Runnable {
+  public:
+    UpdateLocationEvent(nsGeoPosition* aPosition)
+      : mPosition(aPosition)
+    {}
+    NS_IMETHOD Run() override {
+      RefPtr<GonkGPSGeolocationProvider> provider =
+        GonkGPSGeolocationProvider::GetSingleton();
+      nsCOMPtr<nsIGeolocationUpdate> callback = provider->mLocationCallback;
+      provider->mLastGPSPosition = mPosition;
+      if (callback) {
+        callback->Update(mPosition);
+      }
+      return NS_OK;
+    }
+  private:
+    RefPtr<nsGeoPosition> mPosition;
+  };
+
+  MOZ_ASSERT(location);
+
+  const float kImpossibleAccuracy_m = 0.001;
+  if (location->accuracy < kImpossibleAccuracy_m) {
+    return;
+  }
+
+  RefPtr<nsGeoPosition> somewhere = new nsGeoPosition(location->latitude,
+                                                        location->longitude,
+                                                        location->altitude,
+                                                        location->accuracy,
+                                                        location->accuracy,
+                                                        location->bearing,
+                                                        location->speed,
+                                                        PR_Now() / PR_USEC_PER_MSEC);
+  // Note above: Can't use location->timestamp as the time from the satellite is a
+  // minimum of 16 secs old (see http://leapsecond.com/java/gpsclock.htm).
+  // All code from this point on expects the gps location to be timestamped with the
+  // current time, most notably: the geolocation service which respects maximumAge
+  // set in the DOM JS.
+
+  if (gDebug_isLoggingEnabled) {
+    DBG("geo: GPS got a fix (%f, %f). accuracy: %f",
+        location->latitude,
+        location->longitude,
+        location->accuracy);
+  }
+
+  RefPtr<UpdateLocationEvent> event = new UpdateLocationEvent(somewhere);
+  NS_DispatchToMainThread(event);
+
+}
+
+class NotifyObserversGPSTask final : public Runnable
+{
+public:
+  explicit NotifyObserversGPSTask(const char16_t* aData)
+    : mData(aData)
+  {}
+  NS_IMETHOD Run() override {
+    RefPtr<nsIGeolocationProvider> provider =
+    GonkGPSGeolocationProvider::GetSingleton();
+    nsCOMPtr<nsIObserverService> obsService = services::GetObserverService();
+    obsService->NotifyObservers(provider, "geolocation-device-events", mData);
+    return NS_OK;
+  }
+private:
+  const char16_t* mData;
+};
+
+void
+GonkGPSGeolocationProvider::StatusCallback(GpsStatus* status)
+{
+  const char* msgStream=0;
+  switch (status->status) {
+    case GPS_STATUS_NONE:
+      msgStream = "geo: GPS_STATUS_NONE\n";
+      break;
+    case GPS_STATUS_SESSION_BEGIN:
+      msgStream = "geo: GPS_STATUS_SESSION_BEGIN\n";
+      break;
+    case GPS_STATUS_SESSION_END:
+      msgStream = "geo: GPS_STATUS_SESSION_END\n";
+      break;
+    case GPS_STATUS_ENGINE_ON:
+      msgStream = "geo: GPS_STATUS_ENGINE_ON\n";
+      NS_DispatchToMainThread(new NotifyObserversGPSTask(u"GPSStarting"));
+      break;
+    case GPS_STATUS_ENGINE_OFF:
+      msgStream = "geo: GPS_STATUS_ENGINE_OFF\n";
+      NS_DispatchToMainThread(new NotifyObserversGPSTask(u"GPSShutdown"));
+      break;
+    default:
+      msgStream = "geo: Unknown GPS status\n";
+      break;
+  }
+  if (gDebug_isLoggingEnabled){
+    DBG("%s", msgStream);
+  }
+}
+
+void
+GonkGPSGeolocationProvider::SvStatusCallback(GpsSvStatus* sv_info)
+{
+  if (gDebug_isLoggingEnabled) {
+    static int numSvs = 0;
+    static uint32_t numEphemeris = 0;
+    static uint32_t numAlmanac = 0;
+    static uint32_t numUsedInFix = 0;
+
+    unsigned int i = 1;
+    uint32_t svAlmanacCount = 0;
+    for (i = 1; i > 0; i <<= 1) {
+      if (i & sv_info->almanac_mask) {
+        svAlmanacCount++;
+      }
+    }
+
+    uint32_t svEphemerisCount = 0;
+    for (i = 1; i > 0; i <<= 1) {
+      if (i & sv_info->ephemeris_mask) {
+        svEphemerisCount++;
+      }
+    }
+
+    uint32_t svUsedCount = 0;
+    for (i = 1; i > 0; i <<= 1) {
+      if (i & sv_info->used_in_fix_mask) {
+        svUsedCount++;
+      }
+    }
+
+    // Log the message only if the the status changed.
+    if (sv_info->num_svs != numSvs ||
+        svAlmanacCount != numAlmanac ||
+        svEphemerisCount != numEphemeris ||
+        svUsedCount != numUsedInFix) {
+
+      LOG(
+        "geo: Number of SVs have (visibility, almanac, ephemeris): (%d, %d, %d)."
+        "  %d of these SVs were used in fix.\n",
+        sv_info->num_svs, svAlmanacCount, svEphemerisCount, svUsedCount);
+
+      numSvs = sv_info->num_svs;
+      numAlmanac = svAlmanacCount;
+      numEphemeris = svEphemerisCount;
+      numUsedInFix = svUsedCount;
+    }
+  }
+}
+
+void
+GonkGPSGeolocationProvider::NmeaCallback(GpsUtcTime timestamp, const char* nmea, int length)
+{
+  if (gDebug_isLoggingEnabled) {
+    DBG("NMEA: timestamp:\t%lld, length: %d, %s", timestamp, length, nmea);
+  }
+}
+
+void
+GonkGPSGeolocationProvider::SetCapabilitiesCallback(uint32_t capabilities)
+{
+  class UpdateCapabilitiesEvent : public Runnable {
+  public:
+    UpdateCapabilitiesEvent(uint32_t aCapabilities)
+      : mCapabilities(aCapabilities)
+    {}
+    NS_IMETHOD Run() override {
+      RefPtr<GonkGPSGeolocationProvider> provider =
+        GonkGPSGeolocationProvider::GetSingleton();
+
+      provider->mSupportsScheduling = mCapabilities & GPS_CAPABILITY_SCHEDULING;
+      provider->mSupportsSingleShot = mCapabilities & GPS_CAPABILITY_SINGLE_SHOT;
+#ifdef GPS_CAPABILITY_ON_DEMAND_TIME
+      provider->mSupportsTimeInjection = mCapabilities & GPS_CAPABILITY_ON_DEMAND_TIME;
+#endif
+      return NS_OK;
+    }
+  private:
+    uint32_t mCapabilities;
+  };
+
+  NS_DispatchToMainThread(new UpdateCapabilitiesEvent(capabilities));
+}
+
+void
+GonkGPSGeolocationProvider::AcquireWakelockCallback()
+{
+}
+
+void
+GonkGPSGeolocationProvider::ReleaseWakelockCallback()
+{
+}
+
+typedef void *(*pthread_func)(void *);
+
+/** Callback for creating a thread that can call into the JS codes.
+ */
+pthread_t
+GonkGPSGeolocationProvider::CreateThreadCallback(const char* name, void (*start)(void *), void* arg)
+{
+  pthread_t thread;
+  pthread_attr_t attr;
+
+  pthread_attr_init(&attr);
+
+  /* Unfortunately pthread_create and the callback disagreed on what
+   * start function should return.
+   */
+  pthread_create(&thread, &attr, reinterpret_cast<pthread_func>(start), arg);
+
+  return thread;
+}
+
+void
+GonkGPSGeolocationProvider::RequestUtcTimeCallback()
+{
+}
+
+GonkGPSGeolocationProvider::GonkGPSGeolocationProvider()
+  : mStarted(false)
+  , mSupportsScheduling(false)
+  , mObservingSettingsChange(false)
+  , mSupportsSingleShot(false)
+  , mSupportsTimeInjection(false)
+  , mGpsInterface(nullptr)
+{
+}
+
+GonkGPSGeolocationProvider::~GonkGPSGeolocationProvider()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(!mStarted, "Must call Shutdown before destruction");
+
+  sSingleton = nullptr;
+}
+
+already_AddRefed<GonkGPSGeolocationProvider>
+GonkGPSGeolocationProvider::GetSingleton()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (!sSingleton)
+    sSingleton = new GonkGPSGeolocationProvider();
+
+  RefPtr<GonkGPSGeolocationProvider> provider = sSingleton;
+  return provider.forget();
+}
+
+const GpsInterface*
+GonkGPSGeolocationProvider::GetGPSInterface()
+{
+  hw_module_t* module;
+
+  if (hw_get_module(GPS_HARDWARE_MODULE_ID, (hw_module_t const**)&module))
+    return nullptr;
+
+  hw_device_t* device;
+  if (module->methods->open(module, GPS_HARDWARE_MODULE_ID, &device))
+    return nullptr;
+
+  gps_device_t* gps_device = (gps_device_t *)device;
+  const GpsInterface* result = gps_device->get_gps_interface(gps_device);
+
+  if (result->size != sizeof(GpsInterface)) {
+    return nullptr;
+  }
+  return result;
+}
+
+void
+GonkGPSGeolocationProvider::RequestSettingValue(const char* aKey)
+{
+  MOZ_ASSERT(aKey);
+  nsCOMPtr<nsISettingsService> ss = do_GetService("@mozilla.org/settingsService;1");
+  if (!ss) {
+    MOZ_ASSERT(ss);
+    return;
+  }
+
+  nsCOMPtr<nsISettingsServiceLock> lock;
+  nsresult rv = ss->CreateLock(nullptr, getter_AddRefs(lock));
+  if (NS_FAILED(rv)) {
+    ERR("error while createLock setting '%s': %d\n", aKey, uint32_t(rv));
+    return;
+  }
+
+  rv = lock->Get(aKey, this);
+  if (NS_FAILED(rv)) {
+    ERR("error while get setting '%s': %d\n", aKey, uint32_t(rv));
+    return;
+  }
+}
+
+void
+GonkGPSGeolocationProvider::InjectLocation(double latitude,
+                                           double longitude,
+                                           float accuracy)
+{
+  if (gDebug_isLoggingEnabled) {
+    DBG("injecting location (%f, %f) accuracy: %f", latitude, longitude, accuracy);
+  }
+
+  MOZ_ASSERT(NS_IsMainThread());
+  if (!mGpsInterface) {
+    return;
+  }
+
+  mGpsInterface->inject_location(latitude, longitude, accuracy);
+}
+
+void
+GonkGPSGeolocationProvider::Init()
+{
+  // Must not be main thread. Some GPS driver's first init takes very long.
+  MOZ_ASSERT(!NS_IsMainThread());
+
+  mGpsInterface = GetGPSInterface();
+  if (!mGpsInterface) {
+    return;
+  }
+
+  if (!mCallbacks.size) {
+    mCallbacks.size = sizeof(GpsCallbacks);
+    mCallbacks.location_cb = LocationCallback;
+    mCallbacks.status_cb = StatusCallback;
+    mCallbacks.sv_status_cb = SvStatusCallback;
+    mCallbacks.nmea_cb = NmeaCallback;
+    mCallbacks.set_capabilities_cb = SetCapabilitiesCallback;
+    mCallbacks.acquire_wakelock_cb = AcquireWakelockCallback;
+    mCallbacks.release_wakelock_cb = ReleaseWakelockCallback;
+    mCallbacks.create_thread_cb = CreateThreadCallback;
+
+#ifdef GPS_CAPABILITY_ON_DEMAND_TIME
+    mCallbacks.request_utc_time_cb = RequestUtcTimeCallback;
+#endif
+
+  }
+
+  if (mGpsInterface->init(&mCallbacks) != 0) {
+    return;
+  }
+
+  NS_DispatchToMainThread(NewRunnableMethod(this, &GonkGPSGeolocationProvider::StartGPS));
+}
+
+void
+GonkGPSGeolocationProvider::StartGPS()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(mGpsInterface);
+
+  int32_t update = Preferences::GetInt("geo.default.update", kDefaultPeriod);
+
+  int positionMode = GPS_POSITION_MODE_STANDALONE;
+
+  if (!mSupportsScheduling) {
+    update = kDefaultPeriod;
+  }
+
+  mGpsInterface->set_position_mode(positionMode,
+                                   GPS_POSITION_RECURRENCE_PERIODIC,
+                                   update, 0, 0);
+#if FLUSH_AIDE_DATA
+  // Delete cached data
+  mGpsInterface->delete_aiding_data(GPS_DELETE_ALL);
+#endif
+
+  mGpsInterface->start();
+}
+
+
+NS_IMPL_ISUPPORTS(GonkGPSGeolocationProvider::NetworkLocationUpdate,
+                  nsIGeolocationUpdate)
+
+NS_IMETHODIMP
+GonkGPSGeolocationProvider::NetworkLocationUpdate::Update(nsIDOMGeoPosition *position)
+{
+  RefPtr<GonkGPSGeolocationProvider> provider =
+    GonkGPSGeolocationProvider::GetSingleton();
+
+  nsCOMPtr<nsIDOMGeoPositionCoords> coords;
+  position->GetCoords(getter_AddRefs(coords));
+  if (!coords) {
+    return NS_ERROR_FAILURE;
+  }
+
+  double lat, lon, acc;
+  coords->GetLatitude(&lat);
+  coords->GetLongitude(&lon);
+  coords->GetAccuracy(&acc);
+
+  double delta = -1.0;
+
+  static double sLastMLSPosLat = 0;
+  static double sLastMLSPosLon = 0;
+
+  if (0 != sLastMLSPosLon || 0 != sLastMLSPosLat) {
+    delta = CalculateDeltaInMeter(lat, lon, sLastMLSPosLat, sLastMLSPosLon);
+  }
+
+  sLastMLSPosLat = lat;
+  sLastMLSPosLon = lon;
+
+  // if the MLS coord change is smaller than this arbitrarily small value
+  // assume the MLS coord is unchanged, and stick with the GPS location
+  const double kMinMLSCoordChangeInMeters = 10;
+
+  DOMTimeStamp time_ms = 0;
+  if (provider->mLastGPSPosition) {
+    provider->mLastGPSPosition->GetTimestamp(&time_ms);
+  }
+  const int64_t diff_ms = (PR_Now() / PR_USEC_PER_MSEC) - time_ms;
+
+  // We want to distinguish between the GPS being inactive completely
+  // and temporarily inactive. In the former case, we would use a low
+  // accuracy network location; in the latter, we only want a network
+  // location that appears to updating with movement.
+
+  const bool isGPSFullyInactive = diff_ms > 1000 * 60 * 2; // two mins
+  const bool isGPSTempInactive = diff_ms > 1000 * 10; // 10 secs
+
+  if (provider->mLocationCallback) {
+    if (isGPSFullyInactive ||
+       (isGPSTempInactive && delta > kMinMLSCoordChangeInMeters))
+    {
+      if (gDebug_isLoggingEnabled) {
+        DBG("Using MLS, GPS age:%fs, MLS Delta:%fm\n", diff_ms / 1000.0, delta);
+      }
+      provider->mLocationCallback->Update(position);
+    } else if (provider->mLastGPSPosition) {
+      if (gDebug_isLoggingEnabled) {
+        DBG("Using old GPS age:%fs\n", diff_ms / 1000.0);
+      }
+
+      // This is a fallback case so that the GPS provider responds with its last
+      // location rather than waiting for a more recent GPS or network location.
+      // The service decides if the location is too old, not the provider.
+      provider->mLocationCallback->Update(provider->mLastGPSPosition);
+    }
+  }
+  provider->InjectLocation(lat, lon, acc);
+  return NS_OK;
+}
+NS_IMETHODIMP
+GonkGPSGeolocationProvider::NetworkLocationUpdate::NotifyError(uint16_t error)
+{
+  return NS_OK;
+}
+NS_IMETHODIMP
+GonkGPSGeolocationProvider::Startup()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (mStarted) {
+    return NS_OK;
+  }
+
+  RequestSettingValue(kSettingDebugEnabled);
+  RequestSettingValue(kSettingDebugGpsIgnored);
+
+  // Setup an observer to watch changes to the setting.
+  nsCOMPtr<nsIObserverService> observerService = services::GetObserverService();
+  if (observerService) {
+    MOZ_ASSERT(!mObservingSettingsChange);
+    nsresult rv = observerService->AddObserver(this, kMozSettingsChangedTopic, false);
+    if (NS_FAILED(rv)) {
+      NS_WARNING("geo: Gonk GPS AddObserver failed");
+    } else {
+      mObservingSettingsChange = true;
+    }
+  }
+
+  if (!mInitThread) {
+    nsresult rv = NS_NewThread(getter_AddRefs(mInitThread));
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  mInitThread->Dispatch(NewRunnableMethod(this, &GonkGPSGeolocationProvider::Init),
+                        NS_DISPATCH_NORMAL);
+
+  mNetworkLocationProvider = do_CreateInstance("@mozilla.org/geolocation/mls-provider;1");
+  if (mNetworkLocationProvider) {
+    nsresult rv = mNetworkLocationProvider->Startup();
+    if (NS_SUCCEEDED(rv)) {
+      RefPtr<NetworkLocationUpdate> update = new NetworkLocationUpdate();
+      mNetworkLocationProvider->Watch(update);
+    }
+  }
+
+  mStarted = true;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GonkGPSGeolocationProvider::Watch(nsIGeolocationUpdate* aCallback)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  mLocationCallback = aCallback;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GonkGPSGeolocationProvider::Shutdown()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (!mStarted) {
+    return NS_OK;
+  }
+
+  mStarted = false;
+  if (mNetworkLocationProvider) {
+    mNetworkLocationProvider->Shutdown();
+    mNetworkLocationProvider = nullptr;
+  }
+
+  nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
+  if (obs) {
+    nsresult rv;
+    rv = obs->RemoveObserver(this, kMozSettingsChangedTopic);
+    if (NS_FAILED(rv)) {
+      NS_WARNING("geo: Gonk GPS mozsettings RemoveObserver failed");
+    } else {
+      mObservingSettingsChange = false;
+    }
+  }
+
+  mInitThread->Dispatch(NewRunnableMethod(this, &GonkGPSGeolocationProvider::ShutdownGPS),
+                        NS_DISPATCH_NORMAL);
+
+  return NS_OK;
+}
+
+void
+GonkGPSGeolocationProvider::ShutdownGPS()
+{
+  MOZ_ASSERT(!mStarted, "Should only be called after Shutdown");
+
+  if (mGpsInterface) {
+    mGpsInterface->stop();
+    mGpsInterface->cleanup();
+  }
+}
+
+NS_IMETHODIMP
+GonkGPSGeolocationProvider::SetHighAccuracy(bool)
+{
+  return NS_OK;
+}
+
+namespace {
+int
+ConvertToGpsNetworkType(int aNetworkInterfaceType)
+{
+  switch (aNetworkInterfaceType) {
+    case nsINetworkInfo::NETWORK_TYPE_WIFI:
+      return AGPS_RIL_NETWORK_TYPE_WIFI;
+    case nsINetworkInfo::NETWORK_TYPE_MOBILE:
+      return AGPS_RIL_NETWORK_TYPE_MOBILE;
+    case nsINetworkInfo::NETWORK_TYPE_MOBILE_MMS:
+      return AGPS_RIL_NETWORK_TYPE_MOBILE_MMS;
+    case nsINetworkInfo::NETWORK_TYPE_MOBILE_SUPL:
+      return AGPS_RIL_NETWORK_TYPE_MOBILE_SUPL;
+    case nsINetworkInfo::NETWORK_TYPE_MOBILE_DUN:
+      return AGPS_RIL_NETWORK_TTYPE_MOBILE_DUN;
+    default:
+      NS_WARNING(nsPrintfCString("Unknown network type mapping %d",
+                                 aNetworkInterfaceType).get());
+      return -1;
+  }
+}
+} // namespace
+
+NS_IMETHODIMP
+GonkGPSGeolocationProvider::Observe(nsISupports* aSubject,
+                                    const char* aTopic,
+                                    const char16_t* aData)
+{
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (!strcmp(aTopic, kMozSettingsChangedTopic)) {
+    // Read changed setting value
+    RootedDictionary<SettingChangeNotification> setting(RootingCx());
+    if (!WrappedJSToDictionary(aSubject, setting)) {
+      return NS_OK;
+    }
+
+    if (setting.mKey.EqualsASCII(kSettingDebugGpsIgnored)) {
+      LOG("received mozsettings-changed: ignoring\n");
+      gDebug_isGPSLocationIgnored =
+        setting.mValue.isBoolean() ? setting.mValue.toBoolean() : false;
+      if (gDebug_isLoggingEnabled) {
+        DBG("GPS ignored %d\n", gDebug_isGPSLocationIgnored);
+      }
+      return NS_OK;
+    } else if (setting.mKey.EqualsASCII(kSettingDebugEnabled)) {
+      LOG("received mozsettings-changed: logging\n");
+      gDebug_isLoggingEnabled =
+        setting.mValue.isBoolean() ? setting.mValue.toBoolean() : false;
+      return NS_OK;
+    }
+  }
+
+  return NS_OK;
+}
+
+/** nsISettingsServiceCallback **/
+
+NS_IMETHODIMP
+GonkGPSGeolocationProvider::Handle(const nsAString& aName,
+                                   JS::Handle<JS::Value> aResult)
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GonkGPSGeolocationProvider::HandleError(const nsAString& aErrorMessage)
+{
+  return NS_OK;
+}