Initialize the embedder data array on v8::Context to three elements

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 1d2fb8663379ebab158c6abf2c6733bd86529417..917e2cf0ce874e663fc8819486463ad7a0880872 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1313,7 +1313,7 @@ void Genesis::InitializeGlobal(Handle<GlobalObject> inner_global,
   native_context()->set_out_of_memory(heap->false_value());
 
   // Initialize the embedder data slot.
-  Handle<FixedArray> embedder_data = factory->NewFixedArray(2);
+  Handle<FixedArray> embedder_data = factory->NewFixedArray(3);
   native_context()->set_embedder_data(*embedder_data);
 }