Extract device_sensors to /device via Mojofication

content/browser/device_sensors/data_fetcher_shared_memory_mac.cc

Index: content/browser/device_sensors/data_fetcher_shared_memory_mac.cc
diff --git a/content/browser/device_sensors/data_fetcher_shared_memory_mac.cc b/content/browser/device_sensors/data_fetcher_shared_memory_mac.cc
deleted file mode 100644
index 4a1644ffb68e599ed6a260fa1cb9d9ada8c2bbea..0000000000000000000000000000000000000000
--- a/content/browser/device_sensors/data_fetcher_shared_memory_mac.cc
+++ /dev/null
@@ -1,259 +0,0 @@
-// 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/device_sensors/data_fetcher_shared_memory.h"
-
-#include "base/logging.h"
-#include "base/metrics/histogram.h"
-#include "content/browser/device_sensors/ambient_light_mac.h"
-#include "third_party/sudden_motion_sensor/sudden_motion_sensor_mac.h"
-
-namespace {
-
-const double kMeanGravity = 9.80665;
-
-double LMUvalueToLux(uint64_t raw_value) {
-  // Conversion formula from regression.
-  // https://bugzilla.mozilla.org/show_bug.cgi?id=793728
-  // Let x = raw_value, then
-  // lux = -2.978303814*(10^-27)*x^4 + 2.635687683*(10^-19)*x^3 -
-  //       3.459747434*(10^-12)*x^2 + 3.905829689*(10^-5)*x - 0.1932594532
-
-  static const long double k4 = pow(10.L, -7);
-  static const long double k3 = pow(10.L, -4);
-  static const long double k2 = pow(10.L, -2);
-  static const long double k1 = pow(10.L, 5);
-  long double scaled_value = raw_value / k1;
-
-  long double lux_value =
-      (-3 * k4 * pow(scaled_value, 4)) + (2.6 * k3 * pow(scaled_value, 3)) +
-      (-3.4 * k2 * pow(scaled_value, 2)) + (3.9 * scaled_value) - 0.19;
-
-  double lux = ceil(static_cast<double>(lux_value));
-  return lux > 0 ? lux : 0;
-}
-
-void FetchLight(content::AmbientLightSensor* sensor,
-                content::DeviceLightHardwareBuffer* buffer) {
-  DCHECK(sensor);
-  DCHECK(buffer);
-  // Macbook pro has 2 lux values, left and right, we take the average.
-  // The raw sensor values are converted to lux using LMUvalueToLux(raw_value)
-  // similar to how it is done in Firefox.
-  uint64_t lux_value[2];
-  if (!sensor->ReadSensorValue(lux_value))
-    return;
-  uint64_t mean = (lux_value[0] + lux_value[1]) / 2;
-  double lux = LMUvalueToLux(mean);
-  buffer->seqlock.WriteBegin();
-  buffer->data.value = lux;
-  buffer->seqlock.WriteEnd();
-}
-
-void FetchMotion(SuddenMotionSensor* sensor,
-    content::DeviceMotionHardwareBuffer* buffer) {
-  DCHECK(sensor);
-  DCHECK(buffer);
-
-  float axis_value[3];
-  if (!sensor->ReadSensorValues(axis_value))
-    return;
-
-  buffer->seqlock.WriteBegin();
-  buffer->data.accelerationIncludingGravityX = axis_value[0] * kMeanGravity;
-  buffer->data.hasAccelerationIncludingGravityX = true;
-  buffer->data.accelerationIncludingGravityY = axis_value[1] * kMeanGravity;
-  buffer->data.hasAccelerationIncludingGravityY = true;
-  buffer->data.accelerationIncludingGravityZ = axis_value[2] * kMeanGravity;
-  buffer->data.hasAccelerationIncludingGravityZ = true;
-  buffer->data.allAvailableSensorsAreActive = true;
-  buffer->seqlock.WriteEnd();
-}
-
-void FetchOrientation(SuddenMotionSensor* sensor,
-    content::DeviceOrientationHardwareBuffer* buffer) {
-  DCHECK(sensor);
-  DCHECK(buffer);
-
-  // Retrieve per-axis calibrated values.
-  float axis_value[3];
-  if (!sensor->ReadSensorValues(axis_value))
-    return;
-
-  // Transform the accelerometer values to W3C draft angles.
-  //
-  // Accelerometer values are just dot products of the sensor axes
-  // by the gravity vector 'g' with the result for the z axis inverted.
-  //
-  // To understand this transformation calculate the 3rd row of the z-x-y
-  // Euler angles rotation matrix (because of the 'g' vector, only 3rd row
-  // affects to the result). Note that z-x-y matrix means R = Ry * Rx * Rz.
-  // Then, assume alpha = 0 and you get this:
-  //
-  // x_acc = sin(gamma)
-  // y_acc = - cos(gamma) * sin(beta)
-  // z_acc = cos(beta) * cos(gamma)
-  //
-  // After that the rest is just a bit of trigonometry.
-  //
-  // Also note that alpha can't be provided but it's assumed to be always zero.
-  // This is necessary in order to provide enough information to solve
-  // the equations.
-  //
-  const double kRad2deg = 180.0 / M_PI;
-  double beta = kRad2deg * atan2(-axis_value[1], axis_value[2]);
-  double gamma = kRad2deg * asin(axis_value[0]);
-
-  // Make sure that the interval boundaries comply with the specification. At
-  // this point, beta is [-180, 180] and gamma is [-90, 90], but the spec has
-  // the upper bound open on both.
-  if (beta == 180.0)
-    beta = -180;  // -180 == 180 (upside-down)
-  if (gamma == 90.0)
-    gamma = nextafter(90, 0);
-
-  // At this point, DCHECKing is paranoia. Never hurts.
-  DCHECK_GE(beta, -180.0);
-  DCHECK_LT(beta,  180.0);
-  DCHECK_GE(gamma, -90.0);
-  DCHECK_LT(gamma,  90.0);
-
-  buffer->seqlock.WriteBegin();
-  buffer->data.beta = beta;
-  buffer->data.hasBeta = true;
-  buffer->data.gamma = gamma;
-  buffer->data.hasGamma = true;
-  buffer->data.allAvailableSensorsAreActive = true;
-  buffer->seqlock.WriteEnd();
-}
-
-}  // namespace
-
-namespace content {
-
-DataFetcherSharedMemory::DataFetcherSharedMemory() {
-}
-
-DataFetcherSharedMemory::~DataFetcherSharedMemory() {
-}
-
-void DataFetcherSharedMemory::Fetch(unsigned consumer_bitmask) {
-  DCHECK(base::MessageLoop::current() == GetPollingMessageLoop());
-  DCHECK(consumer_bitmask & CONSUMER_TYPE_ORIENTATION ||
-         consumer_bitmask & CONSUMER_TYPE_MOTION ||
-         consumer_bitmask & CONSUMER_TYPE_LIGHT);
-
-  if (consumer_bitmask & CONSUMER_TYPE_ORIENTATION)
-    FetchOrientation(sudden_motion_sensor_.get(), orientation_buffer_);
-  if (consumer_bitmask & CONSUMER_TYPE_MOTION)
-    FetchMotion(sudden_motion_sensor_.get(), motion_buffer_);
-  if (consumer_bitmask & CONSUMER_TYPE_LIGHT)
-    FetchLight(ambient_light_sensor_.get(), light_buffer_);
-}
-
-DataFetcherSharedMemory::FetcherType DataFetcherSharedMemory::GetType() const {
-  return FETCHER_TYPE_POLLING_CALLBACK;
-}
-
-bool DataFetcherSharedMemory::Start(ConsumerType consumer_type, void* buffer) {
-  DCHECK(base::MessageLoop::current() == GetPollingMessageLoop());
-  DCHECK(buffer);
-
-  switch (consumer_type) {
-    case CONSUMER_TYPE_MOTION: {
-      if (!sudden_motion_sensor_)
-        sudden_motion_sensor_.reset(SuddenMotionSensor::Create());
-      bool sudden_motion_sensor_available =
-          sudden_motion_sensor_.get() != nullptr;
-
-      motion_buffer_ = static_cast<DeviceMotionHardwareBuffer*>(buffer);
-      UMA_HISTOGRAM_BOOLEAN("InertialSensor.MotionMacAvailable",
-          sudden_motion_sensor_available);
-      if (!sudden_motion_sensor_available) {
-        // No motion sensor available, fire an all-null event.
-        motion_buffer_->seqlock.WriteBegin();
-        motion_buffer_->data.allAvailableSensorsAreActive = true;
-        motion_buffer_->seqlock.WriteEnd();
-      }
-      return sudden_motion_sensor_available;
-    }
-    case CONSUMER_TYPE_ORIENTATION: {
-      if (!sudden_motion_sensor_)
-        sudden_motion_sensor_.reset(SuddenMotionSensor::Create());
-      bool sudden_motion_sensor_available =
-          sudden_motion_sensor_.get() != nullptr;
-
-      orientation_buffer_ =
-          static_cast<DeviceOrientationHardwareBuffer*>(buffer);
-      UMA_HISTOGRAM_BOOLEAN("InertialSensor.OrientationMacAvailable",
-          sudden_motion_sensor_available);
-      if (sudden_motion_sensor_available) {
-        // On Mac we cannot provide absolute orientation.
-        orientation_buffer_->seqlock.WriteBegin();
-        orientation_buffer_->data.absolute = false;
-        orientation_buffer_->data.hasAbsolute = true;
-        orientation_buffer_->seqlock.WriteEnd();
-      } else {
-        // No motion sensor available, fire an all-null event.
-        orientation_buffer_->seqlock.WriteBegin();
-        orientation_buffer_->data.allAvailableSensorsAreActive = true;
-        orientation_buffer_->seqlock.WriteEnd();
-      }
-      return sudden_motion_sensor_available;
-    }
-    case CONSUMER_TYPE_LIGHT: {
-      if (!ambient_light_sensor_)
-        ambient_light_sensor_ = AmbientLightSensor::Create();
-      bool ambient_light_sensor_available =
-          ambient_light_sensor_.get() != nullptr;
-
-      light_buffer_ = static_cast<DeviceLightHardwareBuffer*>(buffer);
-      if (!ambient_light_sensor_available) {
-        light_buffer_->seqlock.WriteBegin();
-        light_buffer_->data.value = std::numeric_limits<double>::infinity();
-        light_buffer_->seqlock.WriteEnd();
-      }
-      return ambient_light_sensor_available;
-    }
-    default:
-      NOTREACHED();
-  }
-  return false;
-}
-
-bool DataFetcherSharedMemory::Stop(ConsumerType consumer_type) {
-  DCHECK(base::MessageLoop::current() == GetPollingMessageLoop());
-
-  switch (consumer_type) {
-    case CONSUMER_TYPE_MOTION:
-      if (motion_buffer_) {
-        motion_buffer_->seqlock.WriteBegin();
-        motion_buffer_->data.allAvailableSensorsAreActive = false;
-        motion_buffer_->seqlock.WriteEnd();
-        motion_buffer_ = nullptr;
-      }
-      return true;
-    case CONSUMER_TYPE_ORIENTATION:
-      if (orientation_buffer_) {
-        orientation_buffer_->seqlock.WriteBegin();
-        orientation_buffer_->data.allAvailableSensorsAreActive = false;
-        orientation_buffer_->seqlock.WriteEnd();
-        orientation_buffer_ = nullptr;
-      }
-      return true;
-    case CONSUMER_TYPE_LIGHT:
-      if (light_buffer_) {
-        light_buffer_->seqlock.WriteBegin();
-        light_buffer_->data.value = -1;
-        light_buffer_->seqlock.WriteEnd();
-        light_buffer_ = nullptr;
-      }
-      return true;
-    default:
-      NOTREACHED();
-  }
-  return false;
-}
-
-}  // namespace content