Add implementation of WebWidgetClient::initializeLayerTreeView()

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 1efc33cc714538ee0fa242d0da8c93c66a457348..7ab8dc137daa9062b567d3b1738aa240cd0624a5 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -1362,20 +1362,25 @@ void RenderWidget::didDeactivateCompositor() {
     webwidget_->enterForceCompositingMode(false);
 }
 
-void RenderWidget::initializeLayerTreeView(
-    WebKit::WebLayerTreeViewClient* client,
-    const WebKit::WebLayer& root_layer,
-    const WebKit::WebLayerTreeView::Settings& settings) {
-  compositor_ = RenderWidgetCompositor::Create(this, settings);
+void RenderWidget::initializeLayerTreeView() {
+  compositor_ = RenderWidgetCompositor::Create(this);
   if (!compositor_)
     return;
 
-  compositor_->setRootLayer(root_layer);
   compositor_->setViewportSize(size_, physical_backing_size_);
   if (init_complete_)
     compositor_->setSurfaceReady();
 }
 
+void RenderWidget::initializeLayerTreeView(
+    WebKit::WebLayerTreeViewClient* client,
+    const WebKit::WebLayer& root_layer,
+    const WebKit::WebLayerTreeView::Settings& settings) {
+  initializeLayerTreeView();
+  if (compositor_)
+    compositor_->setRootLayer(root_layer);
+}
+
 WebKit::WebLayerTreeView* RenderWidget::layerTreeView() {
   return compositor_.get();
 }