[serializer] add test for snapshotting cached accessor property.

test/cctest/test-serialize.cc

Index: test/cctest/test-serialize.cc
diff --git a/test/cctest/test-serialize.cc b/test/cctest/test-serialize.cc
index d0cd8670bbb2b2ceef748fa11a8cf506fef22f15..5699f84f6158ac9ffeff6fa2578a9e2c7faa475f 100644
--- a/test/cctest/test-serialize.cc
+++ b/test/cctest/test-serialize.cc
@@ -2389,15 +2389,29 @@ TEST(SnapshotCreatorIncludeGlobalProxy) {
       global_template->SetHandler(v8::NamedPropertyHandlerConfiguration(
           NamedPropertyGetterForSerialization));
       global_template->SetAccessor(v8_str("y"), AccessorForSerialization);
+      v8::Local<v8::Private> priv =
+          v8::Private::ForApi(isolate, v8_str("cached"));
+      global_template->SetAccessorProperty(
+          v8_str("cached"),
+          v8::FunctionTemplate::NewWithCache(isolate, SerializedCallback, priv,
+                                             v8::Local<v8::Value>()));
       v8::Local<v8::Context> context =
           v8::Context::New(isolate, &extensions, global_template);
       v8::Context::Scope context_scope(context);
+
+      // Set hidden property.
+      CHECK(context->Global()

[jochen (gone - plz use gerrit), 2016/12/16 11:43:23]

can you also test that setting this after deserializing will work?

+                ->SetPrivate(context, priv, v8_str("cached string"))
+                .FromJust());
+
       ExpectInt32("f()", 42);
       ExpectInt32("g()", 12);
       ExpectInt32("h()", 13);
       ExpectInt32("o.p", 7);
       ExpectInt32("x", 2016);
       ExpectInt32("y", 2017);
+      ExpectString("cached", "cached string");
+
       CHECK_EQ(0u, creator.AddContext(context));
     }
     blob = creator.CreateBlob(v8::SnapshotCreator::FunctionCodeHandling::kClear,
@@ -2453,6 +2467,7 @@ TEST(SnapshotCreatorIncludeGlobalProxy) {
           ExpectInt32("j()", 25);
           ExpectInt32("o.p", 8);
           ExpectInt32("x", 2016);
+          ExpectString("cached", "cached string");
         }
 
         v8::Local<v8::Object> global = context->Global();
@@ -2473,6 +2488,7 @@ TEST(SnapshotCreatorIncludeGlobalProxy) {
           ExpectInt32("j()", 25);
           ExpectInt32("o.p", 8);
           ExpectInt32("x", 2016);
+          ExpectString("cached", "cached string");
         }
 
         CHECK(context2->Global()->Equals(context2, global).FromJust());