Tweaks to the code serializer.

test/cctest/test-serialize.cc

 // Copyright 2007-2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 849 matching lines @@
 
   Handle<JSFunction> copy_fun =
       isolate->factory()->NewFunctionFromSharedFunctionInfo(
           copy, isolate->native_context());
 
   Handle<Object> copy_result =
       Execution::Call(isolate, copy_fun, global, 0, NULL).ToHandleChecked();
 
   CHECK_EQ(6 * 1000000, Handle<String>::cast(copy_result)->length());
   CHECK(isolate->heap()->InSpace(HeapObject::cast(*copy_result), LO_SPACE));
+  // Make sure we do not serialize too much, e.g. include the source string.
+  CHECK_LT(cache->length(), 7000000);
 
   delete cache;
   source.Dispose();
 }
 
 
 TEST(SerializeToplevelThreeBigStrings) {
   FLAG_serialize_toplevel = true;
   LocalContext context;
   Isolate* isolate = CcTest::i_isolate();
@@ skipping 401 matching lines @@
     {
       DisallowCompilation no_compile(reinterpret_cast<Isolate*>(isolate2));
       script = v8::ScriptCompiler::CompileUnbound(
           isolate2, &source, v8::ScriptCompiler::kConsumeCodeCache);
     }
     v8::Local<v8::Value> result = script->BindToCurrentContext()->Run();
     CHECK(result->ToString()->Equals(v8_str("XY")));
   }
   isolate2->Dispose();
 }