Re-re-land FastAccessorBuilder.

test/cctest/cctest.h

Index: test/cctest/cctest.h
diff --git a/test/cctest/cctest.h b/test/cctest/cctest.h
index 0def37546f4241c71456874452e0d6dbe9aed474..fe9ae6e38d9ae1a4addcfd18c0d4bedc6ff66b60 100644
--- a/test/cctest/cctest.h
+++ b/test/cctest/cctest.h
@@ -550,6 +550,12 @@ static inline void ExpectUndefined(const char* code) {
 }
 
 
+static inline void ExpectNull(const char* code) {
+  v8::Local<v8::Value> result = CompileRun(code);
+  CHECK(result->IsNull());
+}
+
+
 static inline void CheckDoubleEquals(double expected, double actual) {
   const double kEpsilon = 1e-10;
   CHECK_LE(expected, actual + kEpsilon);