sync compositor: Keep draw after ComputeScroll synchronous

content/browser/android/synchronous_compositor_host.h

Index: content/browser/android/synchronous_compositor_host.h
diff --git a/content/browser/android/synchronous_compositor_host.h b/content/browser/android/synchronous_compositor_host.h
index 93bfb8e87124eb0698e9e7aa8baa39e8884e34b5..b112ae9390d11151004259f17a1e65e97178e3a5 100644
--- a/content/browser/android/synchronous_compositor_host.h
+++ b/content/browser/android/synchronous_compositor_host.h
@@ -111,6 +111,9 @@ class SynchronousCompositorHost : public SynchronousCompositor {
   size_t bytes_limit_;
   std::unique_ptr<SharedMemoryWithSize> software_draw_shm_;
 
+  // Indicates the next draw needs to be synchronous
+  bool compute_scroll_needs_synchronous_draw_ = false;
+
   // Updated by both renderer and browser.
   gfx::ScrollOffset root_scroll_offset_;