A64: Synchronize with r17807.

src/factory.h

Index: src/factory.h
diff --git a/src/factory.h b/src/factory.h
index 2b4ae7b038993e0e545ea518878160379d821708..92086d4b304d1e477937e4712ce7bc69d40ca24d 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -186,6 +186,7 @@ class Factory {
 
   // Create a symbol.
   Handle<Symbol> NewSymbol();
+  Handle<Symbol> NewPrivateSymbol();
 
   // Create a global (but otherwise uninitialized) context.
   Handle<Context> NewNativeContext();
@@ -223,6 +224,9 @@ class Factory {
   // the old generation).
   Handle<Struct> NewStruct(InstanceType type);
 
+  Handle<AliasedArgumentsEntry> NewAliasedArgumentsEntry(
+      int aliased_context_slot);
+
   Handle<DeclaredAccessorDescriptor> NewDeclaredAccessorDescriptor();
 
   Handle<DeclaredAccessorInfo> NewDeclaredAccessorInfo();