Tiling priorities in Android Webview.

cc/trees/layer_tree_impl.cc

Index: cc/trees/layer_tree_impl.cc
diff --git a/cc/trees/layer_tree_impl.cc b/cc/trees/layer_tree_impl.cc
index bf0a99630d1a982253bd76b98c0b044c2f876973..92c7c627498a5a5909c9640e20b75473bc291c30 100644
--- a/cc/trees/layer_tree_impl.cc
+++ b/cc/trees/layer_tree_impl.cc
@@ -738,10 +738,22 @@ void LayerTreeImpl::SetNeedsCommit() {
   layer_tree_host_impl_->SetNeedsCommit();
 }
 
+gfx::Rect LayerTreeImpl::DeviceViewport() const {
+  return layer_tree_host_impl_->DeviceViewport();
+}
+
 gfx::Size LayerTreeImpl::DrawViewportSize() const {
   return layer_tree_host_impl_->DrawViewportSize();
 }
 
+gfx::Rect LayerTreeImpl::ExternalTilingRect() const {
+  return layer_tree_host_impl_->ExternalTilingRect();
+}
+
+const gfx::Transform& LayerTreeImpl::ExternalTilingTransform() const {
+  return layer_tree_host_impl_->ExternalTilingTransform();
+}
+
 scoped_ptr<ScrollbarAnimationController>
 LayerTreeImpl::CreateScrollbarAnimationController(LayerImpl* scrolling_layer) {
   DCHECK(settings().scrollbar_fade_delay_ms);