Reland "[heap] Uncommit marking deque in concurrent task."

src/heap/page-parallel-job.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_PAGE_PARALLEL_JOB_
 #define V8_HEAP_PAGE_PARALLEL_JOB_
 
 #include "src/allocation.h"
 #include "src/cancelable-task.h"
 #include "src/utils.h"
@@ skipping 85 matching lines @@
             task, v8::Platform::kShortRunningTask);
       } else {
         main_task = task;
       }
     }
     // Contribute on main thread.
     main_task->Run();
     delete main_task;
     // Wait for background tasks.
     for (int i = 0; i < num_tasks_; i++) {
-      if (!cancelable_task_manager_->TryAbort(task_ids[i])) {
+      if (cancelable_task_manager_->TryAbort(task_ids[i]) !=
+          CancelableTaskManager::kTaskAborted) {
         pending_tasks_->Wait();
       }
     }
     if (JobTraits::NeedSequentialFinalization) {
       Item* item = items_;
       while (item != nullptr) {
         bool success = (item->state.Value() == kFinished);
         JobTraits::FinalizePageSequentially(heap_, item->chunk, success,
                                             item->data);
         item = item->next;
@@ skipping 68 matching lines @@
   int num_items_;
   int num_tasks_;
   base::Semaphore* pending_tasks_;
   DISALLOW_COPY_AND_ASSIGN(PageParallelJob);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_PAGE_PARALLEL_JOB_