Read and expose accelerometer values from cros-ec-accel trigger.

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index 1f511db436fbf81cfc344bdddd8e7017b4dad195..3f0841a0f2556a176e3963e6212691b00e1d1e79 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -74,6 +74,7 @@ class WindowModalityController;
 namespace ash {
 
 class AcceleratorController;
+class AccelerometerController;
 class AccessibilityDelegate;
 class AshNativeCursorManager;
 class AutoclickController;
@@ -500,6 +501,10 @@ class ASH_EXPORT Shell
   // Starts the animation that occurs on first login.
   void DoInitialWorkspaceAnimation();
 
+  AccelerometerController* accelerometer_controller() {
+    return accelerometer_controller_.get();
+  }
+
 #if defined(OS_CHROMEOS)
   // TODO(oshima): Move these objects to DisplayController.
   ui::OutputConfigurator* output_configurator() {
@@ -706,6 +711,7 @@ class ASH_EXPORT Shell
       resolution_notification_controller_;
   scoped_ptr<internal::BluetoothNotificationController>
       bluetooth_notification_controller_;
+  scoped_ptr<AccelerometerController> accelerometer_controller_;
   scoped_ptr<internal::LogoutConfirmationController>
       logout_confirmation_controller_;
   scoped_ptr<internal::LastWindowClosedLogoutReminder>