DOM Storage: Populate commit batch values lazily to avoid memory bloat

content/browser/dom_storage/dom_storage_area.h

 // Copyright 2013 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 CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_AREA_H_
 #define CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_AREA_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 147 matching lines @@
 
   // If we haven't done so already and this is a local storage area,
   // will attempt to read any values for this origin currently
   // stored on disk.
   void InitialImportIfNeeded();
 
   // Post tasks to defer writing a batch of changed values to
   // disk on the commit sequence, and to call back on the primary
   // task sequence when complete.
   CommitBatch* CreateCommitBatchIfNeeded();
+  void PopulateCommitBatchValues();
   void StartCommitTimer();
   void OnCommitTimer();
   void PostCommitTask();
   void CommitChanges(const CommitBatch* commit_batch);
   void OnCommitComplete();
   base::TimeDelta ComputeCommitDelay() const;
 
   void ShutdownInCommitSequence();
 
   static bool s_aggressive_flushing_enabled_;
@@ skipping 13 matching lines @@
   base::TimeTicks start_time_;
   RateLimiter data_rate_limiter_;
   RateLimiter commit_rate_limiter_;
 
   DISALLOW_COPY_AND_ASSIGN(DOMStorageArea);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOM_STORAGE_DOM_STORAGE_AREA_H_