Add foundation for trimming the AffiliationDatabase.

components/password_manager/core/browser/facet_manager.h

Index: components/password_manager/core/browser/facet_manager.h
diff --git a/components/password_manager/core/browser/facet_manager.h b/components/password_manager/core/browser/facet_manager.h
index 81c5fed94473a92b0d1d8e70287c8067bd0ee303..5e3ee77279e28fad52e7cff0e01727cbb8880108 100644
--- a/components/password_manager/core/browser/facet_manager.h
+++ b/components/password_manager/core/browser/facet_manager.h
@@ -58,6 +58,10 @@ class FacetManager {
   // more meaningful state than a newly created instance would have.
   bool CanBeDiscarded() const;
 
+  // Returns whether or not cached data for this facet can be discarded without
+  // harm when trimming the database.
+  bool CanCachedDataBeDiscarded() const;
+
   // Returns whether or not affiliation information relating to this facet needs
   // to be fetched right now.
   bool DoesRequireFetch() const;