Implement a poor man's PostAfterStartupTask() function.

content/browser/dom_storage/dom_storage_area.cc

 // 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.
 
 #include "content/browser/dom_storage/dom_storage_area.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/process/process_info.h"
+#include "base/rand_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
 #include "content/browser/dom_storage/dom_storage_namespace.h"
 #include "content/browser/dom_storage/dom_storage_task_runner.h"
 #include "content/browser/dom_storage/local_storage_database_adapter.h"
 #include "content/browser/dom_storage/session_storage_database.h"
 #include "content/browser/dom_storage/session_storage_database_adapter.h"
 #include "content/common/dom_storage/dom_storage_map.h"
 #include "content/common/dom_storage/dom_storage_types.h"
+#include "content/public/browser/browser_main_runner.h"
 #include "storage/browser/database/database_util.h"
 #include "storage/common/database/database_identifier.h"
 #include "storage/common/fileapi/file_system_util.h"
 
 using storage::DatabaseUtil;
 
 namespace content {
 
 namespace {
 
@@ skipping 356 matching lines @@
 
 void DOMStorageArea::OnCommitTimer() {
   if (is_shutdown_)
     return;
 
   // It's possible that there is nothing to commit if an immediate
   // commit occured after the timer was scheduled but before it fired.
   if (!commit_batch_)
     return;
 
+  // Don't mind the double counting of the few that are deferred compared
+  // to the masses that aren't.
+  // TODO: edit histogram.xml
+  bool defer_commit = IsBrowserStartingUp();
+  UMA_HISTOGRAM_BOOLEAN("LocalStorage.Commit", !defer_commit);
+  if (defer_commit) {
+    task_runner_->PostDelayedTask(
+        FROM_HERE, base::Bind(&DOMStorageArea::OnCommitTimer, this),
+        base::TimeDelta::FromSeconds(base::RandInt(5, 15)));
+    return;
+  }
+
   PostCommitTask();
 }
 
 void DOMStorageArea::PostCommitTask() {
   if (is_shutdown_ || !commit_batch_)
     return;
 
   DCHECK(backing_.get());
 
   commit_rate_limiter_.add_samples(1);
@@ skipping 47 matching lines @@
         commit_batch_->clear_all_first,
         commit_batch_->changed_values);
     DCHECK(success);
   }
   commit_batch_.reset();
   backing_.reset();
   session_storage_backing_ = NULL;
 }
 
 }  // namespace content