Minimize malloc heap allocation on process startup.

test/cctest/test-serialize.cc

Index: test/cctest/test-serialize.cc
diff --git a/test/cctest/test-serialize.cc b/test/cctest/test-serialize.cc
index 46f8ad6cd7474d21855dd6c9a30ce8df70846fa4..8e85444eee9faf38951d00d89e5897f3ba094240 100644
--- a/test/cctest/test-serialize.cc
+++ b/test/cctest/test-serialize.cc
@@ -99,10 +99,10 @@ static int make_code(TypeCode type, int id) {
 
 
 TEST(ExternalReferenceEncoder) {
-  OS::Setup();
   Isolate* isolate = i::Isolate::Current();
   isolate->stats_table()->SetCounterFunction(counter_function);
-  HEAP->Setup(false);
+  v8::V8::Initialize();
+
   ExternalReferenceEncoder encoder;
   CHECK_EQ(make_code(BUILTIN, Builtins::kArrayCode),
            Encode(encoder, Builtins::kArrayCode));
@@ -139,10 +139,10 @@ TEST(ExternalReferenceEncoder) {
 
 
 TEST(ExternalReferenceDecoder) {
-  OS::Setup();
   Isolate* isolate = i::Isolate::Current();
   isolate->stats_table()->SetCounterFunction(counter_function);
-  HEAP->Setup(false);
+  v8::V8::Initialize();
+
   ExternalReferenceDecoder decoder;
   CHECK_EQ(AddressOf(Builtins::kArrayCode),
            decoder.Decode(make_code(BUILTIN, Builtins::kArrayCode)));