Check for GpuChannelHost nullity in GetGpuDriverBugWorkarounds

content/renderer/gpu/gpu_benchmarking_extension.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 "content/renderer/gpu/gpu_benchmarking_extension.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
@@ skipping 937 matching lines @@
           new ChildProcessHostMsg_HasGpuProcess(&has_gpu_process)))
     return false;
 
   return has_gpu_process;
 }
 
 void GpuBenchmarking::GetGpuDriverBugWorkarounds(gin::Arguments* args) {
   std::vector<std::string> gpu_driver_bug_workarounds;
   gpu::GpuChannelHost* gpu_channel =
       RenderThreadImpl::current()->GetGpuChannel();
-  if (!gpu_channel->Send(new GpuChannelMsg_GetDriverBugWorkArounds(
+  if (!gpu_channel ||
+      !gpu_channel->Send(new GpuChannelMsg_GetDriverBugWorkArounds(
           &gpu_driver_bug_workarounds))) {
     return;
   }
 
   v8::Local<v8::Value> result;
   if (gin::TryConvertToV8(args->isolate(), gpu_driver_bug_workarounds, &result))
     args->Return(result);
 }
 
 }  // namespace content