replace OVERRIDE and FINAL with override and final in ash/

ash/system/chromeos/power/tray_power.cc

Index: ash/system/chromeos/power/tray_power.cc
diff --git a/ash/system/chromeos/power/tray_power.cc b/ash/system/chromeos/power/tray_power.cc
index e4f094f40f2c1ca3640a9fe75b94fd02106b0265..dca60c4177bcb6b35a07d88ac7a8d32cd4723819 100644
--- a/ash/system/chromeos/power/tray_power.cc
+++ b/ash/system/chromeos/power/tray_power.cc
@@ -59,7 +59,7 @@ class PowerTrayView : public views::ImageView {
   }
 
   // Overriden from views::View.
-  virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE {
+  virtual void GetAccessibleState(ui::AXViewState* state) override {
     state->name = accessible_name_;
     state->role = ui::AX_ROLE_BUTTON;
   }