[Sensors] Consider maximum supported frequency

device/generic_sensor/platform_sensor.cc

 // Copyright 2016 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/generic_sensor/platform_sensor.h"
 
 #include <utility>
 
 #include "base/threading/thread_task_runner_handle.h"
 #include "device/generic_sensor/platform_sensor_provider.h"
@@ skipping 11 matching lines @@
       weak_factory_(this) {}
 
 PlatformSensor::~PlatformSensor() {
   provider_->RemoveSensor(GetType());
 }
 
 mojom::SensorType PlatformSensor::GetType() const {
   return type_;
 }
 
+double PlatformSensor::GetMaximumSupportedFrequency() {
+  return GetDefaultConfiguration().frequency();
+}
+
 bool PlatformSensor::StartListening(Client* client,
                                     const PlatformSensorConfiguration& config) {
   DCHECK(clients_.HasObserver(client));
   if (!CheckSensorConfiguration(config))
     return false;
 
   auto& config_list = config_map_[client];
   config_list.push_back(config);
 
   if (!UpdateSensorInternal(config_map_)) {
@@ skipping 83 matching lines @@
 
   if (!optimal_configuration) {
     StopSensor();
     return true;
   }
 
   return StartSensor(*optimal_configuration);
 }
 
 }  // namespace device