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

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index de419efb02dc771b72b09faade50d0d340572146..d1f46a45ac6e7be05e9e92749105be5ff6767c33 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -510,8 +510,8 @@ void Heap::MergeAllocationSitePretenuringFeedback(
 class Heap::PretenuringScope {
  public:
   explicit PretenuringScope(Heap* heap) : heap_(heap) {
-    heap_->global_pretenuring_feedback_ = new base::HashMap(
-        base::HashMap::PointersMatch, kInitialFeedbackCapacity);
+    heap_->global_pretenuring_feedback_ =
+        new base::HashMap(kInitialFeedbackCapacity);
   }
 
   ~PretenuringScope() {