Snap layers in views to physical pixel

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index b0340ea14fbe07ba0c59ffdc57de8f6ea4b0bbec..202b0b67e99af146442427bbf0cee10c8b9e05ed 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -393,6 +393,10 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   LayoutManager* GetLayoutManager() const;
   void SetLayoutManager(LayoutManager* layout);
 
+  // Adjust the layer's offset so that it snaps to the physical pixel boundary.
+  // This has no effect if the view does not have an associated layer.
+  void SnapLayerToPixelBoundary();
+
   // Attributes ----------------------------------------------------------------
 
   // The view class name.
@@ -1553,6 +1557,9 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // Views. The default is absolute positioning according to bounds_.
   scoped_ptr<LayoutManager> layout_manager_;
 
+  // Whether this View's layer should be snapped to the pixel boundary.
+  bool snap_layer_to_pixel_boundary_;
+
   // Painting ------------------------------------------------------------------
 
   // Background