Avoid rendering using GL in case damage rect is composited by overlay

cc/output/direct_renderer.cc

Index: cc/output/direct_renderer.cc
diff --git a/cc/output/direct_renderer.cc b/cc/output/direct_renderer.cc
index 0a66eea2ae10bab6c2007d7e50fe60ea2c94d924..43e19c39c56a333e6f3e59092ea08ea05fd26188 100644
--- a/cc/output/direct_renderer.cc
+++ b/cc/output/direct_renderer.cc
@@ -242,6 +242,25 @@ void DirectRenderer::DrawFrame(RenderPassList* render_passes_in_draw_order,
     overlay_processor_->ProcessForOverlays(
         resource_provider_, render_passes_in_draw_order, &frame.overlay_list,
         &frame.root_damage_rect);
+
+    // No need to render in case the damage rect is completely composited using
+    // overlays and dont have any copy requests.
+    if (frame.root_damage_rect.IsEmpty()) {
+      bool handle_copy_requests = false;
+      for (auto* pass : *render_passes_in_draw_order) {
+        if (!pass->copy_requests.empty()) {
+          handle_copy_requests = true;
+          break;
+        }
+      }
+
+      if (!handle_copy_requests) {
+        BindFramebufferToOutputSurface(&frame);
+        FinishDrawingFrame(&frame);
+        render_passes_in_draw_order->clear();
+        return;
+      }
+    }
   }
 
   for (size_t i = 0; i < render_passes_in_draw_order->size(); ++i) {