Implement ES5 erratum: global declarations shadow inherited properties.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index b1a23c1ef7078a24ab166aa1254c76d46ef66838..0ab1359b5db230f721542cdfd81af751b92c4d71 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -12440,9 +12440,9 @@ THREADED_TEST(InitGlobalVarInProtoChain) {
   LocalContext context;
   // Introduce a variable in the prototype chain.
   CompileRun("__proto__.x = 42");
-  v8::Handle<v8::Value> result = CompileRun("var x; x");
+  v8::Handle<v8::Value> result = CompileRun("var x = 43; x");
   CHECK(!result->IsUndefined());
-  CHECK_EQ(42, result->Int32Value());
+  CHECK_EQ(43, result->Int32Value());
 }