Skip updating rank in OnExternalCacheHit if cache is uninitialized or disabled.

net/disk_cache/backend_impl.cc

Index: net/disk_cache/backend_impl.cc
diff --git a/net/disk_cache/backend_impl.cc b/net/disk_cache/backend_impl.cc
index deacdd3c7eb4e23857e947ee845ccc3452458ec3..de9650a44182b6de8ff666260d16e3c36c40bcf9 100644
--- a/net/disk_cache/backend_impl.cc
+++ b/net/disk_cache/backend_impl.cc
@@ -683,6 +683,9 @@ void BackendImpl::SyncEndEnumeration(void* iter) {
 }
 
 void BackendImpl::SyncOnExternalCacheHit(const std::string& key) {
+  if (disabled_ || !data_)

[rvargas (doing something else), 2011/08/15 20:45:39]

nit: disabled_ should be enough (to be consistent with the checks on the rest of
the code).

+    return;
+
   uint32 hash = Hash(key);
   bool error;
   EntryImpl* cache_entry = MatchEntry(key, hash, false, Addr(), &error);