Fix handling of named interceptors in optimized code.

src/ast.cc

Index: src/ast.cc
===================================================================
--- src/ast.cc	(revision 10417)
+++ src/ast.cc	(working copy)
@@ -735,6 +735,10 @@
 
 
 bool Call::ComputeTarget(Handle<Map> type, Handle<String> name) {
+  // If there is an interceptor, we can't compute the target for
+  // a direct call.
+  if (type->has_named_interceptor()) return false;
+
   if (check_type_ == RECEIVER_MAP_CHECK) {
     // For primitive checks the holder is set up to point to the
     // corresponding prototype object, i.e. one step of the algorithm