[Sensors] Handle default sensor configuration

third_party/WebKit/Source/modules/sensor/Sensor.h

 // 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.
 
 #ifndef Sensor_h
 #define Sensor_h
 
 #include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/ActiveDOMObject.h"
@@ skipping 50 matching lines @@
     // ActiveScriptWrappable overrides.
     bool hasPendingActivity() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     Sensor(ExecutionContext*, const SensorOptions&, device::mojom::blink::SensorType);
     virtual SensorReading* createSensorReading(SensorProxy*) = 0;
 
     using SensorConfigurationPtr = device::mojom::blink::SensorConfigurationPtr;
-    virtual SensorConfigurationPtr createSensorConfig(const SensorOptions&) = 0;
+    using SensorConfiguration = device::mojom::blink::SensorConfiguration;
+    virtual SensorConfigurationPtr createSensorConfig(const SensorOptions&, const SensorConfiguration& defaultConfiguration) = 0;
 
 private:
     void initSensorProxyIfNeeded();
 
     // ContextLifecycleObserver overrides.
     void contextDestroyed() override;
 
     // SensorController::Observer overrides.
     void onSensorInitialized() override;
     void onSensorReadingChanged() override;
@@ skipping 23 matching lines @@
     SensorState m_state;
     Member<SensorProxy> m_sensorProxy;
     std::unique_ptr<SensorPollingStrategy> m_polling;
     SensorProxy::Reading m_storedData;
     SensorConfigurationPtr m_configuration;
 };
 
 } // namespace blink
 
 #endif // Sensor_h