Update SetPaintToLayer to accept LayerType

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index 147785c6a86b255dc5e279a35c33d7bb0b7aa76b..152ad5a41971cb0c696bcc0672fa95153cd03c20 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -334,10 +334,13 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // Sets whether this view paints to a layer. A view paints to a layer if
   // either of the following are true:
   // . the view has a non-identity transform.
-  // . SetPaintToLayer(true) has been invoked.
+  // . SetPaintToLayer(ui::LayerType) has been invoked.
   // View creates the Layer only when it exists in a Widget with a non-NULL
   // Compositor.
-  void SetPaintToLayer(bool paint_to_layer);
+  void SetPaintToLayer(ui::LayerType layer_type = ui::LAYER_TEXTURED);
+
+  // Removes |view|'s layer if it has its own.
+  void DetachLayer();

[sky, 2017/01/23 17:10:08]

DetachLayer doesn't convey this destroys the layer. OTOH DestroyLayer or
DeleteLayer() better describe what this does. Please name this DestroyLayer()
and move the the implementation of View::DestroyLayer() to match new position.

 
   // Overridden from ui::LayerOwner:
   std::unique_ptr<ui::Layer> RecreateLayer() override;
@@ -1369,7 +1372,7 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // Accelerated painting ------------------------------------------------------
 
   // Creates the layer and related fields for this view.
-  void CreateLayer();
+  void CreateLayer(ui::LayerType layer_type);
 
   // Recursively calls UpdateParentLayers() on all descendants, stopping at any
   // Views that have layers. Calls UpdateParentLayer() for any Views that have