Use chromeos accelerometer reader and support only lid accelerometer.

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..d6b17540a72928bc0c0da46bb8347f785c9956b8 100644
--- a/ash/accelerometer/accelerometer_controller.cc
+++ b/ash/accelerometer/accelerometer_controller.cc
@@ -15,9 +15,9 @@ AccelerometerController::~AccelerometerController() {
 }
 
 void AccelerometerController::Initialize(
-    scoped_refptr<base::TaskRunner> blocking_task_runner) {
+    scoped_refptr<base::TaskRunner> file_task_runner) {
 #if defined(OS_CHROMEOS)
-  reader_.reset(new chromeos::AccelerometerReader(blocking_task_runner, this));
+  reader_.reset(new chromeos::AccelerometerReader(file_task_runner, this));
 #endif
 }