Implement a method to get the total size of a cache entry

net/http/mock_http_cache.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This is a mock of the http cache and related testing classes. To be fair, it
 // is not really a mock http cache given that it uses the real implementation of
 // the http cache, but it has fake implementations of all required components,
 // so it is useful for unit tests at the http layer.
 
 #ifndef NET_HTTP_MOCK_HTTP_CACHE_H_
@@ skipping 19 matching lines @@
   explicit MockDiskEntry(const std::string& key);
 
   bool is_doomed() const { return doomed_; }
 
   void Doom() override;
   void Close() override;
   std::string GetKey() const override;
   base::Time GetLastUsed() const override;
   base::Time GetLastModified() const override;
   int32_t GetDataSize(int index) const override;
+  int64_t GetEntrySize() const override;
   int ReadData(int index,
                int offset,
                IOBuffer* buf,
                int buf_len,
                const CompletionCallback& callback) override;
   int WriteData(int index,
                 int offset,
                 IOBuffer* buf,
                 int buf_len,
                 const CompletionCallback& callback,
@@ skipping 218 matching lines @@
 
   std::unique_ptr<disk_cache::Backend>* backend_;
   CompletionCallback callback_;
   bool block_;
   bool fail_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_MOCK_HTTP_CACHE_H_