[Sensors] Implement sensor data polling

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

Index: third_party/WebKit/Source/modules/sensor/SensorProviderProxy.cpp
diff --git a/third_party/WebKit/Source/modules/sensor/SensorProviderProxy.cpp b/third_party/WebKit/Source/modules/sensor/SensorProviderProxy.cpp
index 023fa933661f83caea7045ecf9a3fa13c641cb6e..0a2de54a5d39548d1269877ab4fd2316438a8523 100644
--- a/third_party/WebKit/Source/modules/sensor/SensorProviderProxy.cpp
+++ b/third_party/WebKit/Source/modules/sensor/SensorProviderProxy.cpp
@@ -39,6 +39,7 @@ SensorProviderProxy::~SensorProviderProxy()
 
 DEFINE_TRACE(SensorProviderProxy)
 {
+    visitor->trace(m_frame);
     visitor->trace(m_sensors);
     Supplement<LocalFrame>::trace(visitor);
 }
@@ -51,7 +52,7 @@ SensorProxy* SensorProviderProxy::getOrCreateSensor(device::mojom::blink::Sensor
             return sensor;
     }
 
-    SensorProxy* sensor = new SensorProxy(type, this);
+    SensorProxy* sensor = new SensorProxy(type, m_frame->page(), this);

[haraken, 2016/09/08 11:07:13]

How is this working? It looks like that no one is assigning a valid frame to
m_frame. So m_frame should be nullptr here.

[Mikhail, 2016/09/08 11:24:48]

Ah I missed m_frame initialization when split the code, sorry for that

     m_sensors.add(sensor);
 
     return sensor;