[base] Remove PointersMatch, making a separate std::equals hashmap

src/heap/mark-compact.cc

Index: src/heap/mark-compact.cc
diff --git a/src/heap/mark-compact.cc b/src/heap/mark-compact.cc
index 08472e5b10448949ef761f91de3fbdaedeead34b..3e4f14004056d5c08e67db5d2c9da297e241a3ee 100644
--- a/src/heap/mark-compact.cc
+++ b/src/heap/mark-compact.cc
@@ -3086,8 +3086,7 @@ class MarkCompactCollector::Evacuator : public Malloced {
   explicit Evacuator(MarkCompactCollector* collector)
       : collector_(collector),
         compaction_spaces_(collector->heap()),
-        local_pretenuring_feedback_(base::HashMap::PointersMatch,
-                                    kInitialLocalPretenuringFeedbackCapacity),
+        local_pretenuring_feedback_(kInitialLocalPretenuringFeedbackCapacity),
         new_space_visitor_(collector->heap(), &compaction_spaces_,
                            &local_pretenuring_feedback_),
         new_space_page_visitor(collector->heap()),