[ic] Support data handlers that represent loads from prototypes.

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 3d73c334ab9133dbf3dc53cc9a78dfb4e1c7c24c..57e68bd8cc9d01925b7874735fa1350e8bd837b5 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -69,6 +69,10 @@ class Factory final {
   // Create a new PrototypeInfo struct.
   Handle<PrototypeInfo> NewPrototypeInfo();
 
+  // Create a new Tuple3 struct.
+  Handle<Tuple3> NewTuple3(Handle<Object> value1, Handle<Object> value2,
+                           Handle<Object> value3);
+
   // Create a new ContextExtension struct.
   Handle<ContextExtension> NewContextExtension(Handle<ScopeInfo> scope_info,
                                                Handle<Object> extension);