Track SimpleCache memory usage in net/ MemoryDumpProvider

net/disk_cache/simple/simple_backend_impl.h

Index: net/disk_cache/simple/simple_backend_impl.h
diff --git a/net/disk_cache/simple/simple_backend_impl.h b/net/disk_cache/simple/simple_backend_impl.h
index a0b4b9c42820e8b05f6dcd3639e5a534af077424..028060f975d2e483e3b32c4ba899a8833a93c04a 100644
--- a/net/disk_cache/simple/simple_backend_impl.h
+++ b/net/disk_cache/simple/simple_backend_impl.h
@@ -31,6 +31,9 @@
 namespace base {
 class SingleThreadTaskRunner;
 class TaskRunner;
+namespace trace_event {
+class ProcessMemoryDump;
+}
 }
 
 namespace disk_cache {
@@ -117,6 +120,8 @@ class NET_EXPORT_PRIVATE SimpleBackendImpl : public Backend,
   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;