Fixes the cache lock issue.

net/base/load_states_list.h

Index: net/base/load_states_list.h
diff --git a/net/base/load_states_list.h b/net/base/load_states_list.h
index 5e850fb622220d3b6cb02a539897032cead220f3..94b9983f0255c897b1858bbfef235f3a5a72c8f0 100644
--- a/net/base/load_states_list.h
+++ b/net/base/load_states_list.h
@@ -39,9 +39,9 @@ LOAD_STATE(WAITING_FOR_DELEGATE, 4)
 
 // This state corresponds to a resource load that is blocked waiting for
 // access to a resource in the cache.  If multiple requests are made for the
-// same resource, the first request will be responsible for writing (or
-// updating) the cache entry and the second request will be deferred until
-// the first completes.  This may be done to optimize for cache reuse.
+// same resource, the requests eligible for shared writing among them will be

[jkarlin, 2017/02/03 18:26:19]

I don't know that we want to mention shared writers in this file, as it's a low
level detail.

Perhaps:

If multiple requests are made for the same resource, they'll typically run in
parallel but in some circumstances they may have to defer until a previous
request has completed.

[shivanisha, 2017/02/06 21:14:10]

Sounds good.

+// responsible for writing (or updating) the cache entry and the remaining
+// requests will be deferred until the writing completes.
 LOAD_STATE(WAITING_FOR_CACHE, 5)
 
 // This state corresponds to a resource load that is blocked waiting for