Fix framerate jank for accelerated content on windows

ui/gfx/surface/accelerated_surface_win.cc

Index: ui/gfx/surface/accelerated_surface_win.cc
diff --git a/ui/gfx/surface/accelerated_surface_win.cc b/ui/gfx/surface/accelerated_surface_win.cc
index d5c7ddc0335b5ef4a4975de6b4ff639e2b42127e..8bd8e46a6409204a0a98d786b6615b4585d82774 100644
--- a/ui/gfx/surface/accelerated_surface_win.cc
+++ b/ui/gfx/surface/accelerated_surface_win.cc
@@ -637,10 +637,6 @@ void AcceleratedPresenter::DoPresentAndAcknowledge(
   if (swap_delay.ToInternalValue())
     base::PlatformThread::Sleep(swap_delay);
 
-  scoped_completion_runner.Release();
-  if (!completion_task.is_null())
-    completion_task.Run(true);
-
   {
     TRACE_EVENT0("surface", "Present");
     hr = swap_chain_->Present(&rect, &rect, window_, NULL, 0);