Touch memory ablation payload in chunks.

chrome/browser/experiments/memory_ablation_experiment.h

 // Copyright 2017 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.
 
 #ifndef CHROME_BROWSER_EXPERIMENTS_MEMORY_ABLATION_EXPERIMENT_H_
 #define CHROME_BROWSER_EXPERIMENTS_MEMORY_ABLATION_EXPERIMENT_H_
 
 #include <memory>
 
 #include "base/feature_list.h"
@@ skipping 17 matching lines @@
 
   // Starts the experiment if corresponding field trial is enabled
   static void MaybeStart(scoped_refptr<base::SequencedTaskRunner> task_runner);
 
  private:
   MemoryAblationExperiment();
 
   void Start(scoped_refptr<base::SequencedTaskRunner> task_runner, size_t size);
 
   void AllocateMemory(size_t size);
-  void TouchMemory();
+  void TouchMemory(size_t offset);
+  void ScheduleTouchMemory(size_t offset);
 
   static MemoryAblationExperiment* GetInstance();
 
+  scoped_refptr<base::SequencedTaskRunner> task_runner_;
   size_t memory_size_ = 0;
   std::unique_ptr<uint8_t[]> memory_;
 };
 
 #endif  // CHROME_BROWSER_EXPERIMENTS_MEMORY_ABLATION_EXPERIMENT_H_