Revert of [ash-md] Fades overview header in and out

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 f7441244b9116f216214a7ea1d18dfca347c444e..a177f256bb0bc8fb35539b5fa4efdcf6299dce85 100644
--- a/ui/aura/client/aura_constants.h
+++ b/ui/aura/client/aura_constants.h
@@ -5,7 +5,6 @@
 #ifndef UI_AURA_CLIENT_AURA_CONSTANTS_H_
 #define UI_AURA_CLIENT_AURA_CONSTANTS_H_
 
-#include "third_party/skia/include/core/SkColor.h"
 #include "ui/aura/aura_export.h"
 #include "ui/aura/window.h"
 #include "ui/base/ui_base_types.h"
@@ -76,9 +75,6 @@
 // the web contents for app windows and varies for fullscreen windows.
 AURA_EXPORT extern const aura::WindowProperty<int>* const kTopViewInset;
 
-// The color of the window header.
-AURA_EXPORT extern const aura::WindowProperty<SkColor>* const kTopViewColor;
-
 // A property key to store window icon.
 AURA_EXPORT extern const WindowProperty<gfx::ImageSkia*>* const kWindowIconKey;