ash: Restore previous show state after exiting fullscreen.

ui/aura/client/aura_constants.h

Index: ui/aura/client/aura_constants.h
diff --git a/ui/aura/client/aura_constants.h b/ui/aura/client/aura_constants.h
index 06256e828ef50172ad6f0ee848d7a701149408a5..71df93741f26207086172b2df2bc0f45989f3014 100644
--- a/ui/aura/client/aura_constants.h
+++ b/ui/aura/client/aura_constants.h
@@ -77,10 +77,17 @@ AURA_EXPORT extern const WindowProperty<int32_t>* const kResizeBehaviorKey;
 // A property key to store the restore bounds for a window.
 AURA_EXPORT extern const WindowProperty<gfx::Rect*>* const kRestoreBoundsKey;
 
-// A property key to store ui::WindowShowState for restoring a window.
+// A property key to store ui::WindowShowState for restoring a window from

[sky, 2017/01/18 22:59:49]

Do you correctly deal with all state transitions:

normal->minimized->fullscreen->minimize->restore (I assume back to normal here).

normal->fullscreen->minimize->restore (I assume back to normal).

?

[Peng, 2017/01/19 20:20:03]

normal->minimized->fullscreen->minimize->unminimize should back to fullscreen
with my CL.

normal->fullscreen->minimize->unminized should backe to fullscreen.

Those are tested in unittest.
https://codereview.chromium.org/2622053004/diff/100001/ash/wm/window_state_un...

+// minimized show state.
 // Used in Ash to remember the show state before the window was minimized.
 AURA_EXPORT extern const WindowProperty<ui::WindowShowState>* const
-    kRestoreShowStateKey;
+    kPreMinimizedShowStateKey;
+
+// A property key to store ui::WindowShowState for restoring a window from
+// fullscreen show state.
+// Used in Ash to remember the show state before the window was fullscreen.
+AURA_EXPORT extern const WindowProperty<ui::WindowShowState>* const
+    kPreFullscreenShowStateKey;
 
 // A property key to store ui::WindowShowState for a window.
 // See ui/base/ui_base_types.h for its definition.