Move DIP translation from ui/aura to ui/compositor

ash/accelerators/accelerator_controller.cc

Index: ash/accelerators/accelerator_controller.cc
diff --git a/ash/accelerators/accelerator_controller.cc b/ash/accelerators/accelerator_controller.cc
index 2deeb9738543b4a5ca90d216a9b2e77439eef9fa..7f9d7575e332b46a037ac0c3304d275be950fbfd 100644
--- a/ash/accelerators/accelerator_controller.cc
+++ b/ash/accelerators/accelerator_controller.cc
@@ -518,6 +518,9 @@ bool AcceleratorController::AcceleratorPressed(
     case CYCLE_MONITOR:
       internal::MultiMonitorManager::CycleMonitor();
       return true;
+    case SCALE_MONITOR:
+      internal::MultiMonitorManager::ScaleMonitor();
+      return true;
 #endif
     default:
       NOTREACHED() << "Unhandled action " << it->second;