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

test/cctest/test-hashmap.cc

Index: test/cctest/test-hashmap.cc
diff --git a/test/cctest/test-hashmap.cc b/test/cctest/test-hashmap.cc
index 2d423b454369a24f609718cdbe793e6c208265fe..b1adc7b0051a4349cbece57729b17f1f88801911 100644
--- a/test/cctest/test-hashmap.cc
+++ b/test/cctest/test-hashmap.cc
@@ -34,17 +34,13 @@
 
 using namespace v8::internal;
 
-static bool DefaultMatchFun(void* a, void* b) {
-  return a == b;
-}
-
 
 typedef uint32_t (*IntKeyHash)(uint32_t key);
 
 
 class IntSet {
  public:
-  explicit IntSet(IntKeyHash hash) : hash_(hash), map_(DefaultMatchFun)  {}
+  explicit IntSet(IntKeyHash hash) : hash_(hash) {}
 
   void Insert(int x) {
     CHECK_NE(0, x);  // 0 corresponds to (void*)NULL - illegal key value