[net] Better StopCaching() handling for HttpCache::Transaction.

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 119 matching lines @@
   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_; }
 
+  // Resets open_count() and create_count(). Calling this is recommended to
+  // reset the counts after test setup.
+  void ResetCounts();
+
   // Fail any subsequent CreateEntry and OpenEntry.
   void set_fail_requests() { fail_requests_ = true; }
 
   // Return entries that fail some of their requests.
   void set_soft_failures(bool value) { soft_failures_ = value; }
 
   // Makes sure that CreateEntry is not called twice for a given key.
   void set_double_create_check(bool value) { double_create_check_ = value; }
 
   // Makes all requests for data ranges to fail as not implemented.
@@ skipping 113 matching lines @@
 
   scoped_ptr<disk_cache::Backend>* backend_;
   CompletionCallback callback_;
   bool block_;
   bool fail_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_MOCK_HTTP_CACHE_H_