Snap widgets to pixel boundary on ash

ash/wm/window_util.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_WM_WINDOW_UTIL_H_
 #define ASH_WM_WINDOW_UTIL_H_
 
 #include "ash/ash_export.h"
 #include "base/compiler_specific.h"
 #include "ui/base/ui_base_types.h"
 
 namespace aura {
 class Window;
 }
 
 namespace gfx {
+class Point;
 class Rect;
 class Size;
 }
 
 namespace ui {
 class Event;
 }
 
 namespace ash {
 // We force at least this many DIPs for any window on the screen.
@@ skipping 62 matching lines @@
                                         aura::Window* old_parent,
                                         aura::Window* new_parent);
 
 // Changes the parent of all transient children of a |child| to |new_parent|.
 // Does not change parent of the transient children that are not themselves
 // children of |old_parent|.
 void ReparentTransientChildrenOfChild(aura::Window* child,
                                       aura::Window* old_parent,
                                       aura::Window* new_parent);
 
+// Snap the window's layer to physical pixel boundary.
+void SnapWindowToPixelBoundary(aura::Window* window);
+
+// Mark the container window so that InstallSnapLayoutManagerToContainers
+// installs the SnapToPixelLayoutManager.
+ASH_EXPORT void SetSnapsChildrenToPhysicalPixelBoundary(
+    aura::Window* container);
+
+// Traverse the |container| tree and installs SnapToPixelLayoutManager.
+void InstallSnapLayoutManagerToContainers(aura::Window* container);
+
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_WINDOW_UTIL_H_