Update from https://crrev.com/312398

cc/resources/gpu_tile_task_worker_pool.cc

 // Copyright 2014 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 "cc/resources/gpu_tile_task_worker_pool.h"
 
 #include <algorithm>
 
 #include "base/debug/trace_event.h"
 #include "cc/resources/raster_buffer.h"
@@ skipping 33 matching lines @@
       new GpuTileTaskWorkerPool(task_runner, task_graph_runner));
 }
 
 // TODO(hendrikw): This class should be removed.  See crbug.com/444938.
 GpuTileTaskWorkerPool::GpuTileTaskWorkerPool(
     base::SequencedTaskRunner* task_runner,
     TaskGraphRunner* task_graph_runner)
     : task_runner_(task_runner),
       task_graph_runner_(task_graph_runner),
       namespace_token_(task_graph_runner_->GetNamespaceToken()),
-      run_tasks_on_origin_thread_pending_(false),
       task_set_finished_weak_ptr_factory_(this),
       weak_ptr_factory_(this) {
 }
 
 GpuTileTaskWorkerPool::~GpuTileTaskWorkerPool() {
   DCHECK_EQ(0u, completed_tasks_.size());
 }
 
 TileTaskRunner* GpuTileTaskWorkerPool::AsTileTaskRunner() {
   return this;
@@ skipping 102 matching lines @@
 void GpuTileTaskWorkerPool::OnTaskSetFinished(TaskSet task_set) {
   TRACE_EVENT1("cc", "GpuTileTaskWorkerPool::OnTaskSetFinished", "task_set",
                task_set);
 
   DCHECK(tasks_pending_[task_set]);
   tasks_pending_[task_set] = false;
   client_->DidFinishRunningTileTasks(task_set);
 }
 
 }  // namespace cc