Make RenderWidget responsible for the composited view's lifetime

webkit/compositor_bindings/web_layer_tree_view_impl.cc

Index: webkit/compositor_bindings/web_layer_tree_view_impl.cc
diff --git a/webkit/compositor_bindings/web_layer_tree_view_impl.cc b/webkit/compositor_bindings/web_layer_tree_view_impl.cc
index e42a3c7696331bf47a8da012a6b1f72fab3371ae..44884c1c87ab7805d7bf75dfdfb4aace4559b9c2 100644
--- a/webkit/compositor_bindings/web_layer_tree_view_impl.cc
+++ b/webkit/compositor_bindings/web_layer_tree_view_impl.cc
@@ -57,6 +57,11 @@ bool WebLayerTreeViewImpl::initialize(const WebLayerTreeView::Settings& webSetti
     return true;
 }
 
+cc::LayerTreeHost* WebLayerTreeViewImpl::layer_tree_host() const
+{
+    return m_layerTreeHost.get();
+}
+
 void WebLayerTreeViewImpl::setSurfaceReady()
 {
     m_layerTreeHost->setSurfaceReady();