Remove void** from disk_cache interface.

net/disk_cache/simple/simple_backend_impl.h

Index: net/disk_cache/simple/simple_backend_impl.h
diff --git a/net/disk_cache/simple/simple_backend_impl.h b/net/disk_cache/simple/simple_backend_impl.h
index 462a101f96147cf8dd7b99165a0c78dc96df8cc5..dbf500c38d4de08fb18cb4f886a2db115080124c 100644
--- a/net/disk_cache/simple/simple_backend_impl.h
+++ b/net/disk_cache/simple/simple_backend_impl.h
@@ -97,9 +97,8 @@ class NET_EXPORT_PRIVATE SimpleBackendImpl : public Backend,
                                  const CompletionCallback& callback) OVERRIDE;
   virtual int DoomEntriesSince(base::Time initial_time,
                                const CompletionCallback& callback) OVERRIDE;
-  virtual int OpenNextEntry(void** iter, Entry** next_entry,
+  virtual int OpenNextEntry(Iterator* iter, Entry** next_entry,
                             const 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;
@@ -158,10 +157,10 @@ class NET_EXPORT_PRIVATE SimpleBackendImpl : public Backend,
   // Called when the index is initilized to find the next entry in the iterator
   // |iter|. If there are no more hashes in the iterator list, net::ERR_FAILED
   // is returned. Otherwise, calls OpenEntryFromHash.
-  void GetNextEntryInIterator(void** iter,
-                              Entry** next_entry,
-                              const CompletionCallback& callback,
-                              int error_code);
+  void OpenNextEntryImpl(Iterator* iter,
+                         Entry** next_entry,
+                         const CompletionCallback& callback,
+                         int index_initialization_error_code);
 
   // Called when we tried to open an entry with hash alone. When a blank entry
   // has been created and filled in with information from the disk - based on a
@@ -184,7 +183,7 @@ class NET_EXPORT_PRIVATE SimpleBackendImpl : public Backend,
   // Called at the end of the asynchronous operation triggered by
   // OpenEntryFromHash. Makes sure to continue iterating if the open entry was
   // not a success.
-  void CheckIterationReturnValue(void** iter,
+  void CheckIterationReturnValue(Iterator* iter,
                                  Entry** entry,
                                  const CompletionCallback& callback,
                                  int error_code);