Revert "[heap] Use RAIL mode for initial heap sizing"

src/heap/incremental-marking-job.h

Index: src/heap/incremental-marking-job.h
diff --git a/src/heap/incremental-marking-job.h b/src/heap/incremental-marking-job.h
index 9a3fb6f71d784df155424ed4138bb982fbb7f0f7..ccc60c55cbb73458dc467fd13b7757899b5066f4 100644
--- a/src/heap/incremental-marking-job.h
+++ b/src/heap/incremental-marking-job.h
@@ -5,7 +5,6 @@
 #ifndef V8_HEAP_INCREMENTAL_MARKING_JOB_H_
 #define V8_HEAP_INCREMENTAL_MARKING_JOB_H_
 
-#include "src/base/atomic-utils.h"
 #include "src/cancelable-task.h"
 
 namespace v8 {
@@ -33,6 +32,8 @@ class IncrementalMarkingJob {
 
   IncrementalMarkingJob() : task_pending_(false) {}
 
+  bool TaskPending() { return task_pending_; }
+
   void Start(Heap* heap);
 
   void NotifyTask();
@@ -40,7 +41,7 @@ class IncrementalMarkingJob {
   void ScheduleTask(Heap* heap);
 
  private:
-  base::AtomicValue<bool> task_pending_;
+  bool task_pending_;
 };
 }  // namespace internal
 }  // namespace v8