Revert of Remove void** from disk_cache interface.

net/http/mock_http_cache.h

Index: net/http/mock_http_cache.h
diff --git a/net/http/mock_http_cache.h b/net/http/mock_http_cache.h
index ab63b114f55212586027138a5db98af8f6dc171c..5ead727b76a7f873dfd111215ac3dc53fac8946e 100644
--- a/net/http/mock_http_cache.h
+++ b/net/http/mock_http_cache.h
@@ -114,7 +114,9 @@
   virtual int DoomEntriesSince(
       base::Time initial_time,
       const net::CompletionCallback& callback) OVERRIDE;
-  virtual scoped_ptr<Iterator> CreateIterator() OVERRIDE;
+  virtual int OpenNextEntry(void** iter, disk_cache::Entry** next_entry,
+                            const net::CompletionCallback& callback) OVERRIDE;
+  virtual void EndEnumeration(void** iter) OVERRIDE;
   virtual void GetStats(
       std::vector<std::pair<std::string, std::string> >* stats) OVERRIDE;
   virtual void OnExternalCacheHit(const std::string& key) OVERRIDE;
@@ -141,7 +143,6 @@
 
  private:
   typedef base::hash_map<std::string, MockDiskEntry*> EntryMap;
-  class NotImplementedIterator;
 
   void CallbackLater(const net::CompletionCallback& callback, int result);