Avoid cross thread malloc / free pair of IOBuffer on the simple cache

net/disk_cache/simple/simple_entry_impl.h

Index: net/disk_cache/simple/simple_entry_impl.h
diff --git a/net/disk_cache/simple/simple_entry_impl.h b/net/disk_cache/simple/simple_entry_impl.h
index 1484fadcefb4af482c12e27ed14fcc828c6e5141..4d3e0479e66b76948194d5d9eede3cc8488b3e47 100644
--- a/net/disk_cache/simple/simple_entry_impl.h
+++ b/net/disk_cache/simple/simple_entry_impl.h
@@ -256,7 +256,8 @@ class NET_EXPORT_PRIVATE SimpleEntryImpl : public Entry,
   void WriteOperationComplete(int stream_index,
                               const CompletionCallback& completion_callback,
                               std::unique_ptr<SimpleEntryStat> entry_stat,
-                              std::unique_ptr<int> result);
+                              std::unique_ptr<int> result,
+                              net::IOBuffer* buf);
 
   void ReadSparseOperationComplete(
       const CompletionCallback& completion_callback,