Don't preparse large files to find boundaries of lazy functions.

test/cctest/test-parsing.cc

Index: test/cctest/test-parsing.cc
diff --git a/test/cctest/test-parsing.cc b/test/cctest/test-parsing.cc
index 7901edc91a79b2c4883d66c344626d085c7d6ef9..e7bf174bc72ea54390763212c47b0b3b5e2fa844 100755
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -855,7 +855,7 @@ TEST(ScopePositions) {
     i::Handle<i::String> source(
         FACTORY->NewStringFromAscii(i::CStrVector(program.start())));
     i::Handle<i::Script> script = FACTORY->NewScript(source);
-    i::Parser parser(script, false, NULL, NULL);
+    i::Parser parser(script, i::kAllowLazy, NULL, NULL);
     parser.SetHarmonyScoping(true);
     i::CompilationInfo info(script);
     info.MarkAsGlobal();