Remove const LayerImpl* from QuadSink

cc/layers/picture_layer_impl.cc

Index: cc/layers/picture_layer_impl.cc
diff --git a/cc/layers/picture_layer_impl.cc b/cc/layers/picture_layer_impl.cc
index 76ab5bb69b647eb42294b39c63a7192ceb9b9ed2..3c10ca7de6f687172f5cb1b78431387e8056056b 100644
--- a/cc/layers/picture_layer_impl.cc
+++ b/cc/layers/picture_layer_impl.cc
@@ -155,7 +155,7 @@ void PictureLayerImpl::AppendQuads(QuadSink* quad_sink,
     gfx::Rect geometry_rect = rect;
     gfx::Rect opaque_rect = contents_opaque() ? geometry_rect : gfx::Rect();
     gfx::Rect visible_geometry_rect =
-        quad_sink->UnoccludedContentRect(geometry_rect, draw_transform());
+        quad_sink->UnoccludedContentRect(this, geometry_rect, draw_transform());
     if (visible_geometry_rect.IsEmpty())
       return;
 
@@ -241,7 +241,7 @@ void PictureLayerImpl::AppendQuads(QuadSink* quad_sink,
        ++iter) {
     gfx::Rect geometry_rect = iter.geometry_rect();
     gfx::Rect visible_geometry_rect =
-        quad_sink->UnoccludedContentRect(geometry_rect, draw_transform());
+        quad_sink->UnoccludedContentRect(this, geometry_rect, draw_transform());
     if (visible_geometry_rect.IsEmpty())
       continue;