[sensors] Add Permission guard to the generic sensor apis.

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 70 matching lines @@
   // ContextLifecycleObserver overrides.
   void contextDestroyed() override;
 
   // SensorController::Observer overrides.
   void onSensorInitialized() override;
   void onSensorReadingChanged() override;
   void onSensorError(ExceptionCode,
                      const String& sanitizedMessage,
                      const String& unsanitizedMessage) override;
 
+  void onSensorPermissionChanged();
+
   void onStartRequestCompleted(bool);
   void onStopRequestCompleted(bool);
 
   // PageVisibilityObserver overrides.
   void pageVisibilityChanged() override;
 
   void startListening();
   void stopListening();
 
   // Makes sensor reading refresh its values from the shared buffer.
@@ skipping 16 matching lines @@
   SensorState m_state;
   Member<SensorProxy> m_sensorProxy;
   std::unique_ptr<SensorPollingStrategy> m_polling;
   device::SensorReading m_storedData;
   SensorConfigurationPtr m_configuration;
 };
 
 }  // namespace blink
 
 #endif  // Sensor_h