1 files changed, 16 insertions, 0 deletions
diff --git a/webkit/appcache/appcache_working_set.cc b/webkit/appcache/appcache_working_set.cc
index 652116c..1c3f40b 100644
--- a/webkit/appcache/appcache_working_set.cc
+++ b/webkit/appcache/appcache_working_set.cc
@@ -17,7 +17,19 @@ AppCacheWorkingSet::~AppCacheWorkingSet() {
   DCHECK(groups_by_origin_.empty());
 }
 
+void AppCacheWorkingSet::Disable() {
+  if (is_disabled_)
+    return;
+  is_disabled_ = true;
+  caches_.clear();
+  groups_.clear();
+  groups_by_origin_.clear();
+  response_infos_.clear();
+}
+
 void AppCacheWorkingSet::AddCache(AppCache* cache) {
+  if (is_disabled_)
+    return;
   DCHECK(cache->cache_id() != kNoCacheId);
   int64 cache_id = cache->cache_id();
   DCHECK(caches_.find(cache_id) == caches_.end());
@@ -29,6 +41,8 @@ void AppCacheWorkingSet::RemoveCache(AppCache* cache) {
 }
 
 void AppCacheWorkingSet::AddGroup(AppCacheGroup* group) {
+  if (is_disabled_)
+    return;
   const GURL& url = group->manifest_url();
   DCHECK(groups_.find(url) == groups_.end());
   groups_.insert(GroupMap::value_type(url, group));
@@ -49,6 +63,8 @@ void AppCacheWorkingSet::RemoveGroup(AppCacheGroup* group) {
 }
 
 void AppCacheWorkingSet::AddResponseInfo(AppCacheResponseInfo* info) {
+  if (is_disabled_)
+    return;
   DCHECK(info->response_id() != kNoResponseId);
   int64 response_id = info->response_id();
   DCHECK(response_infos_.find(response_id) == response_infos_.end());