Make disabling accelerated VPX decoding a GPU driver bug workaround.

gpu/ipc/service/gpu_channel_test_common.cc

 // Copyright (c) 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 "gpu/ipc/service/gpu_channel_test_common.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/test/test_simple_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "gpu/command_buffer/service/sync_point_manager.h"
@@ skipping 34 matching lines @@
 #endif
 
 TestGpuChannelManager::TestGpuChannelManager(
     const GpuPreferences& gpu_preferences,
     GpuChannelManagerDelegate* delegate,
     base::SingleThreadTaskRunner* task_runner,
     base::SingleThreadTaskRunner* io_task_runner,
     SyncPointManager* sync_point_manager,
     GpuMemoryBufferFactory* gpu_memory_buffer_factory)
     : GpuChannelManager(gpu_preferences,
+                        GpuDriverBugWorkarounds(),
                         delegate,
                         nullptr,
                         task_runner,
                         io_task_runner,
                         nullptr,
                         sync_point_manager,
                         gpu_memory_buffer_factory) {}
 
 TestGpuChannelManager::~TestGpuChannelManager() {
   // Clear gpu channels here so that any IPC messages sent are handled using the
@@ skipping 81 matching lines @@
       io_task_runner_.get(), sync_point_manager_.get(), nullptr));
 }
 
 void GpuChannelTestCommon::TearDown() {
   // Destroying channels causes tasks to run on the IO task runner.
   channel_manager_ = nullptr;
 }
 
 
 }  // namespace gpu