GLRenderer should regularly call ResourcePool::CheckBusyResources.

cc/output/gl_renderer.cc

Index: cc/output/gl_renderer.cc
diff --git a/cc/output/gl_renderer.cc b/cc/output/gl_renderer.cc
index b757766dbef74e6a6592fcca4c1bff5fad22c4ee..0d91b275465c4e775a6ae62c2f62dd075d2ba183 100644
--- a/cc/output/gl_renderer.cc
+++ b/cc/output/gl_renderer.cc
@@ -3805,6 +3805,10 @@ bool GLRenderer::IsContextLost() {
 }
 
 void GLRenderer::ScheduleCALayers(DrawingFrame* frame) {
+  if (overlay_resource_pool_) {
+    overlay_resource_pool_->CheckBusyResources();
+  }
+
   scoped_refptr<CALayerOverlaySharedState> shared_state;
   size_t copied_render_pass_count = 0;
   for (const CALayerOverlay& ca_layer_overlay : frame->ca_layer_overlay_list) {