Minor cleanup based on profiler output of CompileParseFunction.

runtime/vm/object_test.cc

Index: runtime/vm/object_test.cc
diff --git a/runtime/vm/object_test.cc b/runtime/vm/object_test.cc
index aa75ee9feb125813453efabb7898a861229fccea..a7e36972891ca6a81a70ba6ce0ee6a5b1fd2139d 100644
--- a/runtime/vm/object_test.cc
+++ b/runtime/vm/object_test.cc
@@ -162,15 +162,16 @@ VM_TEST_CASE(TypeArguments) {
 
 
 VM_TEST_CASE(TokenStream) {
-  String& source = String::Handle(String::New("= ( 9 , ."));
-  String& private_key = String::Handle(String::New(""));
+  Zone* zone = Thread::Current()->zone();
+  String& source = String::Handle(zone, String::New("= ( 9 , ."));
+  String& private_key = String::Handle(zone, String::New(""));
   Scanner scanner(source, private_key);
   const Scanner::GrowableTokenStream& ts = scanner.GetStream();
   EXPECT_EQ(6, ts.length());
   EXPECT_EQ(Token::kLPAREN, ts[1].kind);
   const TokenStream& token_stream = TokenStream::Handle(
-      TokenStream::New(ts, private_key, false));
-  TokenStream::Iterator iterator(token_stream, TokenPosition::kMinSource);
+      zone, TokenStream::New(ts, private_key, false));
+  TokenStream::Iterator iterator(zone, token_stream, TokenPosition::kMinSource);
   // EXPECT_EQ(6, token_stream.Length());
   iterator.Advance();  // Advance to '(' token.
   EXPECT_EQ(Token::kLPAREN, iterator.CurrentTokenKind());