Removed DCHECK.

content/common/gpu/image_transport_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.
 
 #if defined(ENABLE_GPU)
 
 #include "content/common/gpu/image_transport_surface.h"
 
 // Out of order because it has conflicts with other includes on Windows.
 #include "third_party/angle/include/EGL/egl.h"
@@ skipping 100 matching lines @@
 void PbufferImageTransportSurface::Destroy() {
   helper_->Destroy();
   GLSurfaceAdapter::Destroy();
 }
 
 bool PbufferImageTransportSurface::DeferDraws() {
   // The command buffer hit a draw/clear command that could clobber the
   // IOSurface in use by an earlier SwapBuffers. If a Swap is pending, abort
   // processing of the command by returning true and unschedule until the Swap
   // Ack arrives.
-  DCHECK(!did_unschedule_);
+  if (did_unschedule_)
+    return true;
   if (is_swap_buffers_pending_) {
     did_unschedule_ = true;
     helper_->SetScheduled(false);
     return true;
   }
   return false;
 }
 
 bool PbufferImageTransportSurface::IsOffscreen() {
   return false;
@@ skipping 147 matching lines @@
     }
   }
 
   if (surface->Initialize())
     return surface;
   else
     return NULL;
 }
 
 #endif  // ENABLE_GPU