Implement a poor man's PostAfterStartupTask() function.

content/browser/dom_storage/dom_storage_area.cc

Index: content/browser/dom_storage/dom_storage_area.cc
diff --git a/content/browser/dom_storage/dom_storage_area.cc b/content/browser/dom_storage/dom_storage_area.cc
index a2611ebc26c62c409c828ad4f0881ec3a412c6e2..2cc31b558f89a4da8daec6e8731e551248534164 100644
--- a/content/browser/dom_storage/dom_storage_area.cc
+++ b/content/browser/dom_storage/dom_storage_area.cc
@@ -11,6 +11,7 @@
 #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"
@@ -20,6 +21,7 @@
 #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"
@@ -396,6 +398,18 @@ void DOMStorageArea::OnCommitTimer() {
   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();
 }