Support optimistic Create and Write operations on the SimpleCache.

net/http/http_cache.cc

Index: net/http/http_cache.cc
diff --git a/net/http/http_cache.cc b/net/http/http_cache.cc
index 27c591d44501dfe84e4cb46e01514692b7a013af..19c7c86f91e6c832caf0fcf8859f476d92b873ad 100644
--- a/net/http/http_cache.cc
+++ b/net/http/http_cache.cc
@@ -722,7 +722,10 @@ int HttpCache::OpenEntry(const std::string& key, ActiveEntry** entry,
 
 int HttpCache::CreateEntry(const std::string& key, ActiveEntry** entry,
                            Transaction* trans) {
-  DCHECK(!FindActiveEntry(key));
+  if (FindActiveEntry(key)) {
+    return ERR_CACHE_RACE;
+  }
+

[gavinp, 2013/05/03 11:19:27]

Nit: extra blank line.

[felipeg, 2013/05/03 11:47:28]

Done.

 
   WorkItem* item = new WorkItem(WI_CREATE_ENTRY, trans, entry);
   PendingOp* pending_op = GetPendingOp(key);