content: Fix Context creation logic in ContextProviderFactoryImpl.

content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.cc

 // Copyright 2015 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/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 181 matching lines @@
   base::AutoLock lock(lock_);
   decode_done_closure_.Reset();
   decoder_status_ = FAILED;
 }
 
 // static
 void VideoCaptureGpuJpegDecoder::EstablishGpuChannelOnUIThread(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     base::WeakPtr<VideoCaptureGpuJpegDecoder> weak_this) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  DCHECK(BrowserGpuChannelHostFactory::instance());
+
+  // If the factory is unavailable, this means we are shutting down.
+  if (!BrowserGpuChannelHostFactory::instance()) {
+    GpuChannelEstablishedOnUIThread(task_runner, weak_this, nullptr);
+    return;
+  }
 
   BrowserGpuChannelHostFactory::instance()->EstablishGpuChannel(
       base::Bind(&VideoCaptureGpuJpegDecoder::GpuChannelEstablishedOnUIThread,
                  task_runner, weak_this));
 }
 
 // static
 void VideoCaptureGpuJpegDecoder::GpuChannelEstablishedOnUIThread(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     base::WeakPtr<VideoCaptureGpuJpegDecoder> weak_this,
@@ skipping 37 matching lines @@
   lock_.AssertAcquired();
   return !decode_done_closure_.is_null();
 }
 
 void VideoCaptureGpuJpegDecoder::RecordInitDecodeUMA_Locked() {
   UMA_HISTOGRAM_BOOLEAN("Media.VideoCaptureGpuJpegDecoder.InitDecodeSuccess",
                         decoder_status_ == INIT_PASSED);
 }
 
 }  // namespace content