Expose a lower bound of malloc'd memory via heap statistics

test/cctest/test-types.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <vector>
 
 #include "src/crankshaft/hydrogen-types.h"
 #include "src/types.h"
 #include "test/cctest/cctest.h"
 #include "test/cctest/types-fuzz.h"
@@ skipping 16 matching lines @@
 
 typedef uint32_t bitset;
 
 struct Tests {
   typedef Types::TypeVector::iterator TypeIterator;
   typedef Types::MapVector::iterator MapIterator;
   typedef Types::ValueVector::iterator ValueIterator;
 
   Isolate* isolate;
   HandleScope scope;
-  Zone zone;
+  ZoneForTesting zone;
   Types T;
 
   Tests()
       : isolate(CcTest::InitIsolateOnce()),
         scope(isolate),
         zone(),
         T(&zone, isolate, isolate->random_number_generator()) {}
 
   bool IsBitset(Type* type) { return type->IsBitsetForTesting(); }
   bool IsUnion(Type* type) { return type->IsUnionForTesting(); }
@@ skipping 1868 matching lines @@
 
 TEST(Union4_zone) { Tests().Union4(); }
 
 TEST(Intersect_zone) { Tests().Intersect(); }
 
 TEST(Distributivity_zone) { Tests().Distributivity(); }
 
 TEST(GetRange_zone) { Tests().GetRange(); }
 
 TEST(HTypeFromType_zone) { Tests().HTypeFromType(); }