[sensors] Ambient light sensor implementation for ChromeOS and Linux.

device/generic_sensor/sensor_provider_impl.cc

Index: device/generic_sensor/sensor_provider_impl.cc
diff --git a/device/generic_sensor/sensor_provider_impl.cc b/device/generic_sensor/sensor_provider_impl.cc
index 8a7860cb1c971d16493ace11b16fe353f1da3dda..6f2287d8a51319e63fda3e467e717f91f498dca8 100644
--- a/device/generic_sensor/sensor_provider_impl.cc
+++ b/device/generic_sensor/sensor_provider_impl.cc
@@ -32,9 +32,12 @@ void NotifySensorCreated(
 }  // namespace
 
 // static
-void SensorProviderImpl::Create(mojom::SensorProviderRequest request) {
+void SensorProviderImpl::Create(
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+    mojom::SensorProviderRequest request) {
   PlatformSensorProvider* provider = PlatformSensorProvider::GetInstance();
   if (provider) {
+    provider->SetTaskRunner(task_runner);

[Mikhail, 2016/10/28 11:29:03]

1) this is better to be a ctor partameter
2) it should be seen from the arg names that this is a "file" task runner

     mojo::MakeStrongBinding(base::WrapUnique(new SensorProviderImpl(provider)),
                             std::move(request));
   }