Snap widgets to pixel boundary on ash

ash/snap_to_pixel_layout_manager.h

 // Copyright 2014 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 ATHENA_COMMON_FILL_LAYOUT_MANAGER_H_
-#define ATHENA_COMMON_FILL_LAYOUT_MANAGER_H_
+#ifndef ASH_WM_SNAP_TO_PIXEL_LAYOUT_MANAGER_H_
+#define ASH_WM_SNAP_TO_PIXEL_LAYOUT_MANAGER_H_
 
-#include "athena/athena_export.h"
+#include "base/macros.h"
 #include "ui/aura/layout_manager.h"
 
-namespace athena {
+namespace gfx {
+class Point;
+}
 
-class ATHENA_EXPORT FillLayoutManager : public aura::LayoutManager {
+namespace ash {
+
+// A layout manager that places children's layer at the physical pixel
+// boundaries.
+class SnapToPixelLayoutManager : public aura::LayoutManager {
  public:
-  explicit FillLayoutManager(aura::Window* container);
-  virtual ~FillLayoutManager();
+  explicit SnapToPixelLayoutManager(aura::Window* container);
+  virtual ~SnapToPixelLayoutManager();
 
-  // aura::LayoutManager:
+ protected:
+  // Overridden from aura::LayoutManager:
   virtual void OnWindowResized() OVERRIDE;
   virtual void OnWindowAddedToLayout(aura::Window* child) OVERRIDE;
   virtual void OnWillRemoveWindowFromLayout(aura::Window* child) OVERRIDE;
   virtual void OnWindowRemovedFromLayout(aura::Window* child) OVERRIDE;
   virtual void OnChildWindowVisibilityChanged(aura::Window* child,
-                                              bool visible) OVERRIDE;
+                                              bool visibile) OVERRIDE;
   virtual void SetChildBounds(aura::Window* child,
                               const gfx::Rect& requested_bounds) OVERRIDE;
 
  private:
-  aura::Window* container_;
-
-  DISALLOW_COPY_AND_ASSIGN(FillLayoutManager);
+  DISALLOW_COPY_AND_ASSIGN(SnapToPixelLayoutManager);
 };
 
-}  // namespace athena
+}  // namespace ash
 
-#endif  // ATHENA_COMMON_FILL_LAYOUT_MANAGER_H_
+#endif  // ASH_WM_SNAP_TO_PIXEL_LAYOUT_MANAGER_H_