Check for a null callback in RendererSurfaceViewManager

content/renderer/media/android/renderer_surface_view_manager.cc

 // Copyright 2016 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 "content/renderer/media/android/renderer_surface_view_manager.h"
 
 #include "content/common/media/surface_view_manager_messages_android.h"
 #include "ipc/ipc_message_macros.h"
 #include "ui/gfx/geometry/size.h"
 
@@ skipping 24 matching lines @@
       routing_id(), video_natural_size));
 }
 
 void RendererSurfaceViewManager::NaturalSizeChanged(const gfx::Size& size) {
   DVLOG(3) << __FUNCTION__ << ": size: " << size.ToString();
   Send(new SurfaceViewManagerHostMsg_NaturalSizeChanged(routing_id(), size));
 }
 
 void RendererSurfaceViewManager::OnFullscreenSurfaceCreated(int surface_id) {
   DVLOG(3) << __FUNCTION__ << ": surface_id: " << surface_id;
-  DCHECK(!pending_surface_created_cb_.is_null());
-  pending_surface_created_cb_.Run(surface_id);
-  pending_surface_created_cb_.Reset();
+  if (!pending_surface_created_cb_.is_null()) {
+    pending_surface_created_cb_.Run(surface_id);
+    pending_surface_created_cb_.Reset();
+  }
 }
 
 void RendererSurfaceViewManager::OnDestruct() {
   delete this;
 }
 
 }  // namespace content