Instrument SdchOwner for clock nullification.

net/sdch/sdch_owner.h

 // Copyright 2014 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.
 
 #ifndef NET_SDCH_SDCH_OWNER_H_
 #define NET_SDCH_SDCH_OWNER_H_
 
 #include <string>
 
 #include "base/memory/memory_pressure_listener.h"
@@ skipping 58 matching lines @@
     DictionaryInfo() : use_count(0), size(0) {}
     DictionaryInfo(const base::Time& last_used, size_t size)
         : last_used(last_used), use_count(0), size(size) {}
     DictionaryInfo(const DictionaryInfo& rhs) = default;
     DictionaryInfo& operator=(const DictionaryInfo& rhs) = default;
   };
 
   void OnMemoryPressure(
       base::MemoryPressureListener::MemoryPressureLevel level);
 
+  // For debugging http://crbug.com/454198; remove when resolved.
+  void AssertNotDestroyedAndClockNotNull(int line, const GURL& url);
+
   net::SdchManager* manager_;
   net::SdchDictionaryFetcher fetcher_;
 
   std::map<std::string, DictionaryInfo> local_dictionary_info_;
   size_t total_dictionary_bytes_;
 
   scoped_ptr<base::Clock> clock_;
 
   size_t max_total_dictionary_size_;
   size_t min_space_for_dictionary_fetch_;
 
+#if defined(OS_CHROMEOS)
+  // For debugging http://crbug.com/454198; remove when resolved.
+  unsigned int destroyed_;
+#endif
+
   base::MemoryPressureListener memory_pressure_listener_;
 
   DISALLOW_COPY_AND_ASSIGN(SdchOwner);
 };
 
 }  // namespace net
 
 #endif  // NET_SDCH_SDCH_OWNER_H_