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

test/cctest/compiler/test-linkage.cc

 // Copyright 2014 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/code-stubs.h"
 #include "src/compiler.h"
 #include "src/parsing/parser.h"
 #include "src/zone.h"
 
 #include "src/compiler/common-operator.h"
@@ skipping 78 matching lines @@
 }
 
 
 TEST(TestLinkageRuntimeCall) {
   // TODO(titzer): test linkage creation for outgoing runtime calls.
 }
 
 
 TEST(TestLinkageStubCall) {
   Isolate* isolate = CcTest::InitIsolateOnce();
-  Zone zone;
+  Zone zone(isolate->allocator());
   ToNumberStub stub(isolate);
   CompilationInfo info("test", isolate, &zone, Code::ComputeFlags(Code::STUB));
   CallInterfaceDescriptor interface_descriptor =
       stub.GetCallInterfaceDescriptor();
   CallDescriptor* descriptor = Linkage::GetStubCallDescriptor(
       isolate, &zone, interface_descriptor, stub.GetStackParameterCount(),
       CallDescriptor::kNoFlags, Operator::kNoProperties);
   CHECK(descriptor);
   CHECK_EQ(0, static_cast<int>(descriptor->StackParameterCount()));
   CHECK_EQ(1, static_cast<int>(descriptor->ReturnCount()));
   CHECK_EQ(Operator::kNoProperties, descriptor->properties());
   CHECK_EQ(false, descriptor->IsJSFunctionCall());
   // TODO(titzer): test linkage creation for outgoing stub calls.
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8