cc: Implement states for Task for stricter control.

cc/raster/tile_task.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/raster/tile_task.h"
 
 #include "base/logging.h"
 
 namespace cc {
 
 TileTask::TileTask(bool supports_concurrent_execution)
     : supports_concurrent_execution_(supports_concurrent_execution),
       did_schedule_(false),
       did_complete_(false) {}
 
 TileTask::TileTask(bool supports_concurrent_execution,
                    TileTask::Vector* dependencies)
     : supports_concurrent_execution_(supports_concurrent_execution),
       dependencies_(std::move(*dependencies)),
       did_schedule_(false),
       did_complete_(false) {}
 
 TileTask::~TileTask() {
   DCHECK(!did_schedule_);
-  DCHECK(!did_run_ || did_complete_);
+  DCHECK(!state().IsFinished() || did_complete_);
 }
 
 void TileTask::WillSchedule() {
   DCHECK(!did_schedule_);
 }
 
 void TileTask::DidSchedule() {
   did_schedule_ = true;
   did_complete_ = false;
 }
@@ skipping 11 matching lines @@
   DCHECK(!did_complete_);
   did_schedule_ = false;
   did_complete_ = true;
 }
 
 bool TileTask::HasCompleted() const {
   return did_complete_;
 }
 
 }  // namespace cc