Remove pre-MD code from PowerStatusView.

ash/common/system/chromeos/brightness/tray_brightness_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/system/chromeos/brightness/tray_brightness.h"
 
 #include <memory>
 
-#include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "ash/common/system/tray/system_tray_item.h"
 #include "ash/common/test/ash_test.h"
 #include "ash/common/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/shell.h"
 #include "ui/views/view.h"
 
 namespace ash {
 
 class TrayBrightnessTest : public AshTest {
@@ skipping 42 matching lines @@
   std::unique_ptr<views::View> tray(CreateDefaultView());
   Shell::Get()->maximize_mode_controller()->EnableMaximizeModeWindowManager(
       true);
   EXPECT_TRUE(tray->visible());
   Shell::Get()->maximize_mode_controller()->EnableMaximizeModeWindowManager(
       false);
   EXPECT_FALSE(tray->visible());
 }
 
 // Tests that when the detailed view is initially created that its
-// BrightnessView is created as visible for both MD and non MD modes.
+// BrightnessView is created as visible.
 TEST_F(TrayBrightnessTest, CreateDetailedView) {
   std::unique_ptr<views::View> tray(CreateDetailedView());
   EXPECT_TRUE(tray->visible());
 }
 
 // Tests that when the detailed view is created during MaximizeMode that its
 // BrightnessView is visible.
 TEST_F(TrayBrightnessTest, CreateDetailedViewDuringMaximizeMode) {
   Shell::Get()->maximize_mode_controller()->EnableMaximizeModeWindowManager(
       true);
   std::unique_ptr<views::View> tray(CreateDetailedView());
   EXPECT_TRUE(tray->visible());
   Shell::Get()->maximize_mode_controller()->EnableMaximizeModeWindowManager(
       false);
 }
 
 // Tests that the enabling of MaximizeMode has no affect on the visibility of a
 // previously created BrightnessView that belongs to a detailed view.
 TEST_F(TrayBrightnessTest, DetailedViewVisibilityChangesDuringMaximizeMode) {
   std::unique_ptr<views::View> tray(CreateDetailedView());
   Shell::Get()->maximize_mode_controller()->EnableMaximizeModeWindowManager(
       true);
   EXPECT_TRUE(tray->visible());
   Shell::Get()->maximize_mode_controller()->EnableMaximizeModeWindowManager(
       false);
   EXPECT_TRUE(tray->visible());
 }
 
 }  // namespace ash