Consolidate a few fields in RawFunction using bitfields.

runtime/vm/stub_code_ia32_test.cc

Index: runtime/vm/stub_code_ia32_test.cc
===================================================================
--- runtime/vm/stub_code_ia32_test.cc	(revision 9727)
+++ runtime/vm/stub_code_ia32_test.cc	(working copy)
@@ -25,7 +25,8 @@
 static Function* CreateFunction(const char* name) {
   const String& function_name = String::ZoneHandle(String::NewSymbol(name));
   Function& function = Function::ZoneHandle(
-      Function::New(function_name, RawFunction::kFunction, true, false, 0));
+      Function::New(function_name, RawFunction::kFunction,
+                    true, false, false, 0));
   return &function;
 }