content: Fix devtools layer border rendering.

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 7bffa0d79544250fceed101c4efd38b36e863fb8..1cf1b5318b176cbb1eefc8fa28e5b2f7fe536704 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -992,7 +992,10 @@ void RenderWidgetCompositor::SetShowPaintRects(bool show) {
 
 void RenderWidgetCompositor::SetShowDebugBorders(bool show) {
   cc::LayerTreeDebugState debug_state = layer_tree_host_->GetDebugState();
-  debug_state.show_debug_borders = show;
+  if (show)
+    debug_state.show_debug_borders.set();
+  else
+    debug_state.show_debug_borders.reset();
   layer_tree_host_->SetDebugState(debug_state);
 }