[Sensors] Introduce 'unconnected' sensor state

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/ContextLifecycleObserver.h"
@@ skipping 13 matching lines @@
 class SensorReading;
 
 class Sensor : public EventTargetWithInlineData,
                public ActiveScriptWrappable<Sensor>,
                public ContextLifecycleObserver,
                public SensorProxy::Observer {
   USING_GARBAGE_COLLECTED_MIXIN(Sensor);
   DEFINE_WRAPPERTYPEINFO();
 
  public:
-  enum class SensorState { Idle, Activating, Activated, Errored };
+  enum class SensorState { Unconnected, Activating, Activated, Idle, Errored };
 
   ~Sensor() override;
 
   void start(ScriptState*, ExceptionState&);
   void stop(ScriptState*, ExceptionState&);
 
   // EventTarget overrides.
   const AtomicString& interfaceName() const override {
     return EventTargetNames::Sensor;
   }
@@ skipping 65 matching lines @@
   SensorState m_state;
   Member<SensorProxy> m_sensorProxy;
   device::SensorReading m_storedData;
   SensorConfigurationPtr m_configuration;
   double m_lastUpdateTimestamp;
 };
 
 }  // namespace blink
 
 #endif  // Sensor_h