Switching to base::Optional<CompositorFrame> in Android's synchronous compositor IPC messages

content/browser/android/synchronous_compositor_browser_filter.cc

Index: content/browser/android/synchronous_compositor_browser_filter.cc
diff --git a/content/browser/android/synchronous_compositor_browser_filter.cc b/content/browser/android/synchronous_compositor_browser_filter.cc
index d1a7b9f9c9873fd7c0e646256f5d12e43d0be213..87f9240df76864d3d2ea4b1f242eace5e20c7346 100644
--- a/content/browser/android/synchronous_compositor_browser_filter.cc
+++ b/content/browser/android/synchronous_compositor_browser_filter.cc
@@ -81,7 +81,8 @@ bool SynchronousCompositorBrowserFilter::ReceiveFrame(
   auto frame_ptr = base::MakeUnique<SynchronousCompositor::Frame>();
   frame_ptr->compositor_frame_sink_id = std::get<0>(param);
   cc::CompositorFrame& compositor_frame = std::get<1>(param);
-  if (compositor_frame.delegated_frame_data) {
+  bool has_swapped = std::get<2>(param);
+  if (has_swapped) {
     frame_ptr->frame.reset(new cc::CompositorFrame);
     *frame_ptr->frame = std::move(compositor_frame);
   }