Remove void** from disk_cache interface.

net/disk_cache/disk_cache_test_base.h

Index: net/disk_cache/disk_cache_test_base.h
diff --git a/net/disk_cache/disk_cache_test_base.h b/net/disk_cache/disk_cache_test_base.h
index b724906289528dc425c41606cdabb71941602170..93ccd7d5f5098cef07f415de6dd04efc499860e9 100644
--- a/net/disk_cache/disk_cache_test_base.h
+++ b/net/disk_cache/disk_cache_test_base.h
@@ -11,6 +11,7 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread.h"
 #include "net/base/cache_type.h"
+#include "net/disk_cache/disk_cache.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
@@ -117,7 +118,8 @@ class DiskCacheTestWithCache : public DiskCacheTest {
   int DoomEntriesBetween(const base::Time initial_time,
                          const base::Time end_time);
   int DoomEntriesSince(const base::Time initial_time);
-  int OpenNextEntry(void** iter, disk_cache::Entry** next_entry);
+  int OpenNextEntry(disk_cache::Backend::Iterator* iter,
+                    disk_cache::Entry** next_entry);
   void FlushQueueForTest();
   void RunTaskForTest(const base::Closure& closure);
   int ReadData(disk_cache::Entry* entry, int index, int offset,