Track SimpleCache memory usage in net/ MemoryDumpProvider

net/disk_cache/simple/simple_backend_impl.h

 // Copyright (c) 2013 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_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_
 #define NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 13 matching lines @@
 #include "net/base/cache_type.h"
 #include "net/base/net_export.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/disk_cache/simple/simple_entry_impl.h"
 #include "net/disk_cache/simple/simple_experiment.h"
 #include "net/disk_cache/simple/simple_index_delegate.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 class TaskRunner;
+namespace trace_event {
+class ProcessMemoryDump;
+}
 }
 
 namespace disk_cache {
 
 // SimpleBackendImpl is a new cache backend that stores entries in individual
 // files.
 // See http://www.chromium.org/developers/design-documents/network-stack/disk-cache/very-simple-backend
 //
 // The SimpleBackendImpl provides safe iteration; mutating entries during
 // iteration cannot cause a crash. It is undefined whether entries created or
@@ skipping 66 matching lines @@
   int DoomEntriesSince(base::Time initial_time,
                        const CompletionCallback& callback) override;
   int CalculateSizeOfAllEntries(const CompletionCallback& callback) override;
   int CalculateSizeOfEntriesBetween(
       base::Time initial_time,
       base::Time end_time,
       const CompletionCallback& callback) override;
   std::unique_ptr<Iterator> CreateIterator() override;
   void GetStats(base::StringPairs* stats) override;
   void OnExternalCacheHit(const std::string& key) override;
+  void DumpMemoryStats(base::trace_event::ProcessMemoryDump* pmd,
+                       const std::string& parent_absolute_name) const override;
 
  private:
   class SimpleIterator;
   friend class SimpleIterator;
 
   using EntryMap = std::unordered_map<uint64_t, SimpleEntryImpl*>;
 
   using InitializeIndexCallback =
       base::Callback<void(base::Time mtime, uint64_t max_size, int result)>;
 
@@ skipping 97 matching lines @@
   // operations to be run at the completion of the Doom.
   std::unordered_map<uint64_t, std::vector<base::Closure>>
       entries_pending_doom_;
 
   net::NetLog* const net_log_;
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_