mash: Move ash constants and layout constants files to //ash/common

ash/ash_constants.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef ASH_ASH_CONSTANTS_H_
-#define ASH_ASH_CONSTANTS_H_
-
-#include "ash/ash_export.h"
-#include "ui/aura/window.h"
-#include "ui/base/ui_base_types.h"
-
-typedef unsigned int SkColor;
-
-namespace ash {
-
-// In the window corners, the resize areas don't actually expand bigger, but the
-// 16 px at the end of each edge triggers diagonal resizing.
-ASH_EXPORT extern const int kResizeAreaCornerSize;
-
-// Ash windows do not have a traditional visible window frame. Window content
-// extends to the edge of the window. We consider a small region outside the
-// window bounds and an even smaller region overlapping the window to be the
-// "non-client" area and use it for resizing.
-ASH_EXPORT extern const int kResizeOutsideBoundsSize;
-ASH_EXPORT extern const int kResizeOutsideBoundsScaleForTouch;
-ASH_EXPORT extern const int kResizeInsideBoundsSize;
-
-#if defined(OS_CHROMEOS)
-// Background color used for the Chrome OS boot splash screen.
-extern const SkColor kChromeOsBootColor;
-#endif
-
-// The border color of keyboard focus for launcher items and system tray.
-extern const SkColor kFocusBorderColor;
-
-// How many pixels are reserved for touch-events towards the top of an
-// immersive-fullscreen window.
-extern const int kImmersiveFullscreenTopEdgeInset;
-
-}  // namespace ash
-
-#endif  // ASH_ASH_CONSTANTS_H_