Use standardized and extendable accelerometer update type.

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 a8de559e1d4a7881c669ccf7f614f67cb8f42638..12c881635a86cfe708ff17e8289a0252642592a2 100644
--- a/ash/accelerometer/accelerometer_controller.cc
+++ b/ash/accelerometer/accelerometer_controller.cc
@@ -5,7 +5,6 @@
 #include "ash/accelerometer/accelerometer_controller.h"
 
 #include "ash/accelerometer/accelerometer_observer.h"
-#include "ui/gfx/geometry/vector3d_f.h"
 
 namespace ash {
 
@@ -31,11 +30,10 @@ void AccelerometerController::RemoveObserver(AccelerometerObserver* observer) {
 }
 
 #if defined(OS_CHROMEOS)
-void AccelerometerController::HandleAccelerometerReading(
-    const gfx::Vector3dF& base,
-    const gfx::Vector3dF& lid) {
+void AccelerometerController::HandleAccelerometerUpdate(
+    const chromeos::AccelerometerUpdate& update) {
   FOR_EACH_OBSERVER(AccelerometerObserver, observers_,
-      OnAccelerometerUpdated(base, lid));
+      OnAccelerometerUpdated(update));
 }
 #endif