Pass a WeakPtr of the decoder_ to prevent SEGFAULT.

content/common/gpu/media/video_decode_accelerator_unittest.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.
 //
 // The bulk of this file is support code; sorry about that.  Here's an overview
 // to hopefully help readers of this code:
 // - RenderingHelper is charged with interacting with X11/{EGL/GLES2,GLX/GL} or
 //   Win/EGL.
 // - ClientState is an enum for the state of the decode client used by the test.
 // - ClientStateNotification is a barrier abstraction that allows the test code
@@ skipping 467 matching lines @@
   media::PictureBuffer* picture_buffer =
       picture_buffers_by_id_[picture.picture_buffer_id()];
   CHECK(picture_buffer);
   if (!suppress_rendering_) {
     rendering_helper_->RenderTexture(picture_buffer->texture_id());
   }
 
   if (num_decoded_frames_ > delay_reuse_after_frame_num_) {
     base::MessageLoop::current()->PostDelayedTask(FROM_HERE, base::Bind(
         &VideoDecodeAccelerator::ReusePictureBuffer,
-        base::Unretained(decoder_.get()), picture.picture_buffer_id()),
+        decoder_->AsWeakPtr(), picture.picture_buffer_id()),
         base::TimeDelta::FromMilliseconds(kReuseDelayMs));
   } else {
     decoder_->ReusePictureBuffer(picture.picture_buffer_id());
   }
 }
 
 void GLRenderingVDAClient::NotifyInitializeDone() {
   SetState(CS_INITIALIZED);
   initialize_done_ticks_ = base::TimeTicks::Now();
   for (int i = 0; i < num_in_flight_decodes_; ++i)
@@ skipping 552 matching lines @@
 #elif defined(OS_CHROMEOS)
 #if defined(ARCH_CPU_ARMEL)
   content::ExynosVideoDecodeAccelerator::PreSandboxInitialization();
 #elif defined(ARCH_CPU_X86_FAMILY)
   content::VaapiWrapper::PreSandboxInitialization();
 #endif  // ARCH_CPU_ARMEL
 #endif  // OS_CHROMEOS
 
   return RUN_ALL_TESTS();
 }