[snapshot] Move builtins generation into mksnapshot

src/setup-isolate-deserialize.cc

Index: src/setup-isolate-deserialize.cc
diff --git a/src/setup-isolate-deserialize.cc b/src/setup-isolate-deserialize.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ce14c83d17d044cde936e0ba06f39230597cd6a1
--- /dev/null
+++ b/src/setup-isolate-deserialize.cc
@@ -0,0 +1,36 @@
+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/setup-isolate.h"
+
+#include "src/base/logging.h"
+#include "src/interpreter/interpreter.h"
+#include "src/isolate.h"
+#include "src/ostreams.h"
+
+namespace v8 {
+namespace internal {
+
+void SetupIsolateDelegate::SetupBuiltins(Isolate* isolate,
+                                         bool create_heap_objects) {
+  DCHECK(!create_heap_objects);
+  // No actual work to be done; builtins will be deserialized from the snapshot.
+  isolate->builtins()->MarkInitialized();
+}
+
+void SetupIsolateDelegate::SetupInterpreter(
+    interpreter::Interpreter* interpreter, bool create_heap_objects) {
+#ifdef V8_USE_SNAPSHOT
+  if (FLAG_trace_ignition || FLAG_trace_ignition_codegen ||
+      FLAG_trace_ignition_dispatches) {
+    OFStream os(stdout);
+    os << "Warning: --trace-ignition-* flags must be passed at mksnapshot "
+       << "time or used with nosnapshot builds." << std::endl;
+  }
+#endif
+  DCHECK(interpreter->IsDispatchTableInitialized());
+}
+
+}  // namespace internal
+}  // namespace v8