Fixed broken build.

src/api.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3023 matching lines @@
                                &DisposeExternalAsciiString);
   }
   return result;
 }
 
 
 bool v8::String::CanMakeExternal() {
   if (IsDeadCheck("v8::String::CanMakeExternal()")) return false;
   i::Handle<i::String> obj = Utils::OpenHandle(this);
   int size = obj->Size();  // Byte size of the original string.
-  return (size >= i::ExternalString::kSize) && !obj->IsExternalString();
+  if (size < i::ExternalString::kSize)
+    return false;
+  i::StringShape shape(*obj);
+  return !shape.IsExternal();
 }
 
 
 Local<v8::Object> v8::Object::New() {
   EnsureInitialized("v8::Object::New()");
   LOG_API("Object::New");
   ENTER_V8;
   i::Handle<i::JSObject> obj =
       i::Factory::NewJSObject(i::Top::object_function());
   return Utils::ToLocal(obj);
@@ skipping 591 matching lines @@
       reinterpret_cast<HandleScopeImplementer*>(storage);
   List<void**>* blocks_of_archived_thread = thread_local->Blocks();
   v8::ImplementationUtilities::HandleScopeData* handle_data_of_archived_thread =
       &thread_local->handle_scope_data_;
   Iterate(v, blocks_of_archived_thread, handle_data_of_archived_thread);
 
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal