using PictureLayerImpl::MarkVisibleResourcesAsRequired;
using PictureLayerImpl::DoPostCommitInitializationIfNeeded;
using PictureLayerImpl::MinimumContentsScale;
+ using PictureLayerImpl::GetViewportForTilePriorityInContentSpace;
using PictureLayerImpl::SanityCheckTilingState;
+ using PictureLayerImpl::GetRecycledTwinLayer;
using PictureLayerImpl::UpdateIdealScales;
using PictureLayerImpl::MaximumTilingContentsScale;