Allows fullscreen to be triggered with the key events used for scrolling.

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 b9fb860db5a8e16c9c569b39f8d36050baec4ab0..4cdc16571875eecf3ffef39ec22717293ecf5060 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -347,6 +347,11 @@ void RenderWidgetCompositor::UpdateTopControlsState(
                                            animate);
 }
 
+void RenderWidgetCompositor::UpdateTopControlsStatePreservingConstraints(
+    bool show) {
+  layer_tree_host_->UpdateTopControlsStatePreservingConstraints(show);
+}
+
 void RenderWidgetCompositor::SetOverdrawBottomHeight(
     float overdraw_bottom_height) {
   layer_tree_host_->SetOverdrawBottomHeight(overdraw_bottom_height);