Removed DCHECK.

content/common/gpu/image_transport_surface_win.cc

Index: content/common/gpu/image_transport_surface_win.cc
diff --git a/content/common/gpu/image_transport_surface_win.cc b/content/common/gpu/image_transport_surface_win.cc
index 9777e2727375131aec70645f10566fc662ccbc6f..33813c7ea47dc0e19a57a03a3725d85b1723d29b 100644
--- a/content/common/gpu/image_transport_surface_win.cc
+++ b/content/common/gpu/image_transport_surface_win.cc
@@ -118,7 +118,8 @@ bool PbufferImageTransportSurface::DeferDraws() {
   // 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);