Snap layers in views to physical pixel

ui/compositor/dip_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 UI_COMPOSITOR_DIP_UTIL_H_
 #define UI_COMPOSITOR_DIP_UTIL_H_
 
 #include "ui/compositor/compositor_export.h"
 #include "base/basictypes.h"
 #include "ui/gfx/point_f.h"
@@ skipping 26 matching lines @@
 COMPOSITOR_EXPORT gfx::Point ConvertPointToPixel(
     const Layer* layer,
     const gfx::Point& point_in_dip);
 COMPOSITOR_EXPORT gfx::Size ConvertSizeToPixel(
     const Layer* layer,
     const gfx::Size& size_in_dip);
 COMPOSITOR_EXPORT gfx::Rect ConvertRectToPixel(
     const Layer* layer,
     const gfx::Rect& rect_in_dip);
 
+// Snaps the |layer_to_snap| to the physical pixel boundary.
+// |snapped_layer| is a reference layer that should also be
+// snapped at the pysical pixel boundary.
+COMPOSITOR_EXPORT void SnapLayerToPhysicalPixelBoundary(
+    ui::Layer* snapped_layer,
+    ui::Layer* layer_to_snap);
+
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_DIP_UTIL_H_