[appcache] Don't write during startup.

content/browser/appcache/appcache_storage_impl.h

Index: content/browser/appcache/appcache_storage_impl.h
diff --git a/content/browser/appcache/appcache_storage_impl.h b/content/browser/appcache/appcache_storage_impl.h
index ca6d76b314bf0c4c945ea29bb02c10a930b0c943..6a28305a46ece143707b083216e0c287c7fff426 100644
--- a/content/browser/appcache/appcache_storage_impl.h
+++ b/content/browser/appcache/appcache_storage_impl.h
@@ -15,6 +15,7 @@
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "base/timer/timer.h"
 #include "content/browser/appcache/appcache_database.h"
 #include "content/browser/appcache/appcache_disk_cache.h"
 #include "content/browser/appcache/appcache_storage.h"
@@ -87,7 +88,8 @@ class AppCacheStorageImpl : public AppCacheStorage {
   class GetDeletableResponseIdsTask;
   class InsertDeletableResponseIdsTask;
   class DeleteDeletableResponseIdsTask;
-  class UpdateGroupLastAccessTimeTask;
+  class LazyUpdateLastAccessTimeTask;
+  class CommitLastAccessTimesTask;
 
   typedef std::deque<DatabaseTask*> DatabaseTaskQueue;
   typedef std::map<int64, CacheLoadTask*> PendingCacheLoads;
@@ -111,12 +113,13 @@ class AppCacheStorageImpl : public AppCacheStorage {
   void StartDeletingResponses(const std::vector<int64>& response_ids);
   void ScheduleDeleteOneResponse();
   void DeleteOneResponse();
-
   void OnDeletedOneResponse(int rv);
   void OnDiskCacheInitialized(int rv);
   void DeleteAndStartOver();
   void DeleteAndStartOverPart2();
   void CallScheduleReinitialize();
+  void LazilyCommitLastAccessTimes();

[dmurph, 2015/02/20 00:04:45]

Can you put a comment saying the magnitude of time it will take? And that it's
batching calling in that time period? 

+  void OnCommitLastAccessTimes();
 
   // Sometimes we can respond without having to query the database.
   bool FindResponseForMainRequestInGroup(
@@ -168,6 +171,7 @@ class AppCacheStorageImpl : public AppCacheStorage {
   bool is_disabled_;
 
   scoped_ptr<AppCacheDiskCache> disk_cache_;
+  base::OneShotTimer<AppCacheStorageImpl> lazy_commit_timer_;
 
   // Used to short-circuit certain operations without having to schedule
   // any tasks on the background database thread.