Reland net-related fixups for scoped_refptr conversion operator cleanup.

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 2bd00818b9cfb1f550f432f9f53521b41b66f049..462a101f96147cf8dd7b99165a0c78dc96df8cc5 100644
--- a/net/disk_cache/simple/simple_backend_impl.h
+++ b/net/disk_cache/simple/simple_backend_impl.h
@@ -169,7 +169,7 @@ class NET_EXPORT_PRIVATE SimpleBackendImpl : public Backend,
   // using a key in the meantime.
   void OnEntryOpenedFromHash(uint64 hash,
                              Entry** entry,
-                             scoped_refptr<SimpleEntryImpl> simple_entry,
+                             const scoped_refptr<SimpleEntryImpl>& simple_entry,
                              const CompletionCallback& callback,
                              int error_code);
 
@@ -177,7 +177,7 @@ class NET_EXPORT_PRIVATE SimpleBackendImpl : public Backend,
   // opened, a check for key mismatch is performed.
   void OnEntryOpenedFromKey(const std::string key,
                             Entry** entry,
-                            scoped_refptr<SimpleEntryImpl> simple_entry,
+                            const scoped_refptr<SimpleEntryImpl>& simple_entry,
                             const CompletionCallback& callback,
                             int error_code);