Move maximize/fullscreen/restore to shell

ui/aura/aura_constants.h

Index: ui/aura/aura_constants.h
diff --git a/ui/aura/aura_constants.h b/ui/aura/aura_constants.h
index adb9fea4e236bcc6e12dad948503b4c38faa4624..66a691141a2e7ed1a2a84d1b2a1054ed9413a98a 100644
--- a/ui/aura/aura_constants.h
+++ b/ui/aura/aura_constants.h
@@ -9,7 +9,18 @@
 #include "ui/aura/aura_export.h"
 
 namespace aura {
+// Window property keys that are shared between aura_shell and chrome/views.
 
+// A property key to store the restore bounds for a window. The type
+// of the value is |gfx::Rect*|.
+AURA_EXPORT extern const char* kRestoreBoundsKey;
+
+// A property key to store ui::WindowShowState for a window.
+// See ui/base/ui_base_types.h for its definition.
+AURA_EXPORT extern const char* kShowStateKey;
+
+// A property key to store tooltip text for a window. The type of the value
+// is |std::string*|.
 AURA_EXPORT extern const char* kTooltipTextKey;
 
 }  // namespace aura