Remove void** from disk_cache interface.

net/http/mock_http_cache.cc

Index: net/http/mock_http_cache.cc
diff --git a/net/http/mock_http_cache.cc b/net/http/mock_http_cache.cc
index a91b2c1aa83107c737b67aa40ab064b1ef44f1f3..c6741fadb786c0376f5030935c0ca85f97f6173a 100644
--- a/net/http/mock_http_cache.cc
+++ b/net/http/mock_http_cache.cc
@@ -457,14 +457,11 @@ int MockDiskCache::DoomEntriesSince(const base::Time initial_time,
   return net::ERR_NOT_IMPLEMENTED;
 }
 
-int MockDiskCache::OpenNextEntry(void** iter, disk_cache::Entry** next_entry,
+int MockDiskCache::OpenNextEntry(Iterator* iter, disk_cache::Entry** next_entry,
                                  const net::CompletionCallback& callback) {
   return net::ERR_NOT_IMPLEMENTED;
 }
 
-void MockDiskCache::EndEnumeration(void** iter) {
-}
-
 void MockDiskCache::GetStats(
     std::vector<std::pair<std::string, std::string> >* stats) {
 }