Fix framerate jank for accelerated content on windows

ui/gfx/surface/accelerated_surface_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/surface/accelerated_surface_win.h"
 
 #include <windows.h>
 #include <algorithm>
 
 #include "base/bind.h"
@@ skipping 619 matching lines @@
 
       if (hr == S_FALSE)
         Sleep(1);
     } while (hr == S_FALSE);
   }
 
   static const base::TimeDelta swap_delay = GetSwapDelay();
   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);
     if (FAILED(hr) &&
         FAILED(present_thread_->device()->CheckDeviceState(window_))) {
       present_thread_->ResetDevice();
     }
   }
 }
 
@@ skipping 21 matching lines @@
   return presenter_->Present();
 }
 
 bool AcceleratedSurface::CopyTo(const gfx::Size& size, void* buf) {
   return presenter_->CopyTo(size, buf);
 }
 
 void AcceleratedSurface::Suspend() {
   presenter_->Suspend();
 }