Add a size estimation mechanism to StoragePartitionHttpCacheDataRemover.

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 109 matching lines @@
                   disk_cache::Entry** entry,
                   const CompletionCallback& callback) override;
   int DoomEntry(const std::string& key,
                 const CompletionCallback& callback) override;
   int DoomAllEntries(const CompletionCallback& callback) override;
   int DoomEntriesBetween(base::Time initial_time,
                          base::Time end_time,
                          const CompletionCallback& callback) override;
   int DoomEntriesSince(base::Time initial_time,
                        const CompletionCallback& callback) override;
+  int CalculateSizeOfAllEntries(const CompletionCallback& callback) override;
   scoped_ptr<Iterator> CreateIterator() override;
   void GetStats(base::StringPairs* stats) override;
   void OnExternalCacheHit(const std::string& key) override;
 
   // Returns number of times a cache entry was successfully opened.
   int open_count() const { return open_count_; }
 
   // Returns number of times a cache entry was successfully created.
   int create_count() const { return create_count_; }
 
@@ skipping 123 matching lines @@
 
   scoped_ptr<disk_cache::Backend>* backend_;
   CompletionCallback callback_;
   bool block_;
   bool fail_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_MOCK_HTTP_CACHE_H_