RFC: use some in-memory state in SimpleCache to quickly cache-miss some CantConditionalize cases

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;
+  uint8_t GetOracleByte() const { return oracle_byte_; }
+  void SetOracleByte(uint8_t val) 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 41 matching lines @@
   // delivers any callback previously stored.
   static void StoreAndDeliverCallbacks(bool store,
                                        MockDiskEntry* entry,
                                        const CompletionCallback& callback,
                                        int result);
 
   static const int kNumCacheEntryDataIndices = 3;
 
   std::string key_;
   std::vector<char> data_[kNumCacheEntryDataIndices];
+  unsigned char oracle_byte_;
   int test_mode_;
   bool doomed_;
   bool sparse_;
   bool fail_requests_;
   bool fail_sparse_requests_;
   bool busy_;
   bool delayed_;
   bool cancel_;
   static bool ignore_callbacks_;
 };
 
 class MockDiskCache : public disk_cache::Backend {
  public:
   MockDiskCache();
   ~MockDiskCache() override;
 
   CacheType GetCacheType() const override;
   int32_t GetEntryCount() const override;
   int OpenEntry(const std::string& key,
                 disk_cache::Entry** entry,
                 const CompletionCallback& callback) override;
+  int OpenEntryWithOracleByte(const std::string& key,
+                              disk_cache::Entry** entry,
+                              const OracleCallback& oracle,
+                              const CompletionCallback& callback) override;
   int CreateEntry(const std::string& key,
                   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,
@@ skipping 144 matching lines @@
 
   std::unique_ptr<disk_cache::Backend>* backend_;
   CompletionCallback callback_;
   bool block_;
   bool fail_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_MOCK_HTTP_CACHE_H_