[Sensors] Allow Sensor API only on secure top-level browsing contexts and add frequency checks

third_party/WebKit/LayoutTests/sensor/resources/sensor-helpers.js

 'use strict';
 
 function sensor_mocks(mojo) {
   return define('Generic Sensor API mocks', [
     'mojo/public/js/core',
     'mojo/public/js/bindings',
     'mojo/public/js/connection',
     'device/generic_sensor/public/interfaces/sensor_provider.mojom',
     'device/generic_sensor/public/interfaces/sensor.mojom',
   ], (core, bindings, connection, sensor_provider, sensor) => {
@@ skipping 31 matching lines @@
       // Returns default configuration.
       getDefaultConfiguration() {
         return Promise.resolve({frequency: 5});
       }
 
       // Adds configuration for the sensor and starts reporting fake data
       // through update_reading_function_ callback.
       addConfiguration(configuration) {
         assert_not_equals(configuration, null, "Invalid sensor configuration.");
 
-        if (this.add_configuration_called_ != null) {
-          this.add_configuration_called_(this);
-        }
-
         if (!this.start_should_fail_ && this.update_reading_function_ != null) {
           let timeout = (1 / configuration.frequency) * 1000;
           this.sensor_reading_timer_id_ = window.setTimeout(() => {
             this.update_reading_function_(this.buffer_);
             if (this.reporting_mode_ === sensor.ReportingMode.ON_CHANGE) {
               this.client_.sensorReadingChanged();
             }
           }, timeout);
+        }
 
-          this.active_sensor_configurations_.push(configuration);
-        }
+        this.active_sensor_configurations_.push(configuration);
+
+        if (this.add_configuration_called_ != null)
+          this.add_configuration_called_(this);
 
         return sensorResponse(!this.start_should_fail_);
       }
 
       // Removes sensor configuration from the list of active configurations and
       // stops notification about sensor reading changes if
       // active_sensor_configurations_ is empty.
       removeConfiguration(configuration) {
         if (this.remove_configuration_called_ != null) {
           this.remove_configuration_called_(this);
@@ skipping 216 matching lines @@
   });
 }
 
 function sensor_test(func, name, properties) {
   mojo_test(mojo => sensor_mocks(mojo).then(sensor => {
     let result = Promise.resolve(func(sensor));
     let cleanUp = () => { sensor.mockSensorProvider.reset(); };
     return result.then(cleanUp, cleanUp);
   }), name, properties);
 }