cc: Move data to LayerTree from LayerTreeHost.

cc/layers/picture_layer.cc

Index: cc/layers/picture_layer.cc
diff --git a/cc/layers/picture_layer.cc b/cc/layers/picture_layer.cc
index 0a3d9761e9db1f4cbc0d73c16418d046485c00b8..facaf3111093a677ff509c7b3882add81e1edf83 100644
--- a/cc/layers/picture_layer.cc
+++ b/cc/layers/picture_layer.cc
@@ -59,7 +59,7 @@ void PictureLayer::PushPropertiesTo(LayerImpl* base_layer) {
   scoped_refptr<RasterSource> raster_source =
       recording_source_->CreateRasterSource(can_use_lcd_text);
   layer_impl->set_gpu_raster_max_texture_size(
-      layer_tree_host()->device_viewport_size());
+      GetLayerTree()->device_viewport_size());
   layer_impl->UpdateRasterSource(raster_source, &last_updated_invalidation_,
                                  nullptr);
   DCHECK(last_updated_invalidation_.IsEmpty());