Do SetNeedsCommit() instead of Composite() in threaded mode.

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index cc7fc98999a757d3282a82017e07fa3f82fae59b..17f98ad884980c6634a1c4c85656b22649f123ac 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -355,10 +355,6 @@ void RenderWidgetCompositor::UpdateAnimations(base::TimeTicks time) {
   layer_tree_host_->UpdateClientAnimations(time);
 }
 
-void RenderWidgetCompositor::Composite(base::TimeTicks frame_begin_time) {
-  layer_tree_host_->Composite(frame_begin_time);
-}
-
 void RenderWidgetCompositor::SetNeedsDisplayOnAllLayers() {
   layer_tree_host_->SetNeedsDisplayOnAllLayers();
 }