Remove implicit conversions from scoped_refptr to T* in ash

ash/accelerometer/accelerometer_controller.cc

Index: ash/accelerometer/accelerometer_controller.cc
diff --git a/ash/accelerometer/accelerometer_controller.cc b/ash/accelerometer/accelerometer_controller.cc
index e529e869a2e7a8d9bcb6e5871f0577a54bc8e9e7..4e04259c242a6aeae2b8063a8515b19a33524650 100644
--- a/ash/accelerometer/accelerometer_controller.cc
+++ b/ash/accelerometer/accelerometer_controller.cc
@@ -17,7 +17,8 @@ AccelerometerController::~AccelerometerController() {
 void AccelerometerController::Initialize(
     scoped_refptr<base::TaskRunner> blocking_task_runner) {
 #if defined(OS_CHROMEOS)
-  reader_.reset(new chromeos::AccelerometerReader(blocking_task_runner, this));
+  reader_.reset(
+      new chromeos::AccelerometerReader(blocking_task_runner.get(), this));
 #endif
 }