Re-land FastAccessorBuilder.

test/cctest/cctest.h

 // Copyright 2008 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 532 matching lines @@
   CHECK(result->SameValue(expected));
 }
 
 
 static inline void ExpectUndefined(const char* code) {
   v8::Local<v8::Value> result = CompileRun(code);
   CHECK(result->IsUndefined());
 }
 
 
+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);
   CHECK_GE(expected, actual - kEpsilon);
 }
 
 
 static void DummyDebugEventListener(
     const v8::Debug::EventDetails& event_details) {}
 
@@ skipping 35 matching lines @@
   HandleAndZoneScope() {}
 
   // Prefixing the below with main_ reduces a lot of naming clashes.
   i::Zone* main_zone() { return &main_zone_; }
 
  private:
   i::Zone main_zone_;
 };
 
 #endif  // ifndef CCTEST_H_