media: CHECK AVDATimerManager construction task runner is not null

content/common/gpu/media/android_video_decode_accelerator.cc

 // Copyright (c) 2013 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/common/gpu/media/android_video_decode_accelerator.h"
 
 #include <stddef.h>
 
 #include "base/android/build_info.h"
 #include "base/auto_reset.h"
@@ skipping 934 matching lines @@
   // Tell the strategy that we're changing codecs.  The codec itself could be
   // used normally, since we don't replace it until we're back on the main
   // thread.  However, if we're using an output surface, then the incoming codec
   // might access that surface while the main thread is drawing.  Telling the
   // strategy to forget the codec avoids this.
   if (media_codec_) {
     media_codec_.reset();
     strategy_->CodecChanged(nullptr, output_picture_buffers_);
   }
 
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner =
+      g_avda_timer.Pointer()->ConstructionTaskRunner();
+  CHECK(task_runner);
+
   base::PostTaskAndReplyWithResult(
-      g_avda_timer.Pointer()->ConstructionTaskRunner().get(), FROM_HERE,
+      task_runner.get(), FROM_HERE,
       base::Bind(&AndroidVideoDecodeAccelerator::ConfigureMediaCodecOnAnyThread,
                  codec_config_),
       base::Bind(&AndroidVideoDecodeAccelerator::OnCodecConfigured,
                  weak_this_factory_.GetWeakPtr()));
 }
 
 bool AndroidVideoDecodeAccelerator::ConfigureMediaCodecSynchronously() {
   state_ = WAITING_FOR_CODEC;
   std::unique_ptr<media::VideoCodecBridge> media_codec =
       ConfigureMediaCodecOnAnyThread(codec_config_);
@@ skipping 376 matching lines @@
     if (media::MediaCodecUtil::IsSurfaceViewOutputSupported()) {
       capabilities.flags |= media::VideoDecodeAccelerator::Capabilities::
           SUPPORTS_EXTERNAL_OUTPUT_SURFACE;
     }
   }
 
   return capabilities;
 }
 
 }  // namespace content