Show WindowStateType in the ash window tree for debugging by shortcut

If the flag is enabled, when pressing Ctrl-Shift-Alt-W, an ash window
tree is dumped to the UI log. This CL adds WindowStateType of each
window to that log.

Bug: none
Test: Press Ctrl-Shift-Alt-W and see the type is correctly dumped in log

Change-Id: I813539a02378800fb124e133fadd850853b04059
Reviewed-on: https://chromium-review.googlesource.com/c/1322259
Commit-Queue: Yoshiki Iguchi <yoshiki@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606339}

ash/accelerators/debug_commands.cc

@@ -13,8 +13,10 @@
 #include "ash/system/toast/toast_manager.h"
 #include "ash/touch/touch_devices_controller.h"
 #include "ash/wallpaper/wallpaper_controller.h"
+#include "ash/wm/focus_rules.h"
 #include "ash/wm/tablet_mode/tablet_mode_controller.h"
 #include "ash/wm/widget_finder.h"
+#include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "ash/ws/window_service_owner.h"
 #include "base/command_line.h"
@@ -72,8 +74,10 @@ void PrintWindowHierarchy(ws::WindowService* window_service,
   const gfx::Vector2dF& subpixel_position_offset =
       window->layer()->subpixel_position_offset();
   *out << indent_str << name << " (" << window << ")"
-       << " type=" << window->type()
-       << ((window == active_window) ? " [active]" : "")
+       << " type=" << window->type();
+  if (ash::IsToplevelWindow(window))
+    *out << " " << wm::GetWindowState(window)->GetStateType();
+  *out << ((window == active_window) ? " [active]" : "")
        << ((window == focused_window) ? " [focused]" : "")
        << (window->IsVisible() ? " visible" : "") << " "
        << window->bounds().ToString();