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

src/fast-accessor-assembler.cc

 // Copyright 2015 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 "src/fast-accessor-assembler.h"
 
 #include "src/base/logging.h"
 #include "src/code-stubs.h"  // For CallApiCallbackStub.
 #include "src/compiler/code-stub-assembler.h"
 #include "src/handles-inl.h"
 #include "src/objects.h"  // For FAA::LoadInternalField impl.
 
 using v8::internal::compiler::CodeStubAssembler;
 using v8::internal::compiler::Node;
 
 namespace v8 {
 namespace internal {
 
 FastAccessorAssembler::FastAccessorAssembler(Isolate* isolate)
-    : zone_(),
+    : zone_(isolate->allocator()),
       isolate_(isolate),
       assembler_(new CodeStubAssembler(isolate, zone(), 1,
                                        Code::ComputeFlags(Code::STUB),
                                        "FastAccessorAssembler")),
       state_(kBuilding) {}
 
 FastAccessorAssembler::~FastAccessorAssembler() { Clear(); }
 
 FastAccessorAssembler::ValueId FastAccessorAssembler::IntegerConstant(
     int const_value) {
@@ skipping 191 matching lines @@
 void FastAccessorAssembler::Clear() {
   for (auto label : labels_) {
     delete label;
   }
   nodes_.clear();
   labels_.clear();
 }
 
 }  // namespace internal
 }  // namespace v8