[sensors] Fix flakiness in generic sensors tests

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

Index: third_party/WebKit/Source/modules/sensor/SensorProviderProxy.h
diff --git a/third_party/WebKit/Source/modules/sensor/SensorProviderProxy.h b/third_party/WebKit/Source/modules/sensor/SensorProviderProxy.h
index f328e7c378232d3416dce12d29cbaf951ef1eced..e4b6c4103646929e870eff4fd6e9905134c8e711 100644
--- a/third_party/WebKit/Source/modules/sensor/SensorProviderProxy.h
+++ b/third_party/WebKit/Source/modules/sensor/SensorProviderProxy.h
@@ -43,10 +43,9 @@ class SensorProviderProxy final
 
   explicit SensorProviderProxy(LocalFrame*);
   static const char* supplementName();
+  void initializeSensorProviderIfNeeded(LocalFrame*);
 
-  device::mojom::blink::SensorProvider* sensorProvider() const {
-    return m_sensorProvider.get();
-  }
+  device::mojom::blink::SensorProvider* getSensorProvider() const;
 
   void onSensorProviderConnectionError();