Revert of Rename MaximizeMode to TabletMode

ash/wm/power_button_controller.cc

Index: ash/wm/power_button_controller.cc
diff --git a/ash/wm/power_button_controller.cc b/ash/wm/power_button_controller.cc
index 076c2c90fa9ed6f117d2177a8f317f3108037586..efbdbca2b2180649ee8dd9810a8860e56200473a 100644
--- a/ash/wm/power_button_controller.cc
+++ b/ash/wm/power_button_controller.cc
@@ -13,8 +13,8 @@
 #include "ash/system/power/tablet_power_button_controller.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/wm/lock_state_controller.h"
+#include "ash/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/wm/session_state_animator.h"
-#include "ash/wm/tablet_mode/tablet_mode_controller.h"
 #include "base/command_line.h"
 #include "chromeos/audio/cras_audio_handler.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
@@ -59,8 +59,8 @@
 
   bool should_take_screenshot = down && volume_down_pressed_ &&
                                 Shell::Get()
-                                    ->tablet_mode_controller()
-                                    ->IsTabletModeWindowManagerEnabled();
+                                    ->maximize_mode_controller()
+                                    ->IsMaximizeModeWindowManagerEnabled();
 
   if (!has_legacy_power_button_ && !should_take_screenshot &&
       tablet_controller_ &&