Implement in-memory byte hints in SimpleCache

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 99de65ad754ee497f886ed6a1bffa4bf8418acf5..59d1783e956794dc1765611bca2d33afedd1467a 100644
--- a/net/disk_cache/simple/simple_backend_impl.h
+++ b/net/disk_cache/simple/simple_backend_impl.h
@@ -122,6 +122,8 @@ class NET_EXPORT_PRIVATE SimpleBackendImpl : public Backend,
   size_t DumpMemoryStats(
       base::trace_event::ProcessMemoryDump* pmd,
       const std::string& parent_absolute_name) const override;
+  uint8_t GetEntryInMemoryData(const std::string& key) override;
+  void SetEntryInMemoryData(const std::string& key, uint8_t data) override;
 
  private:
   class SimpleIterator;