diff --git a/src/snapshot/natives-common.cc b/src/snapshot/natives-common.cc
new file mode 100644
index 0000000..f30e794
--- /dev/null
+++ b/src/snapshot/natives-common.cc
@@ -0,0 +1,57 @@
+// Copyright 2015 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.
+
+// The common functionality when building with internal or external natives.
+
+#include "src/heap/heap.h"
+#include "src/objects-inl.h"
+#include "src/snapshot/natives.h"
+
+namespace v8 {
+namespace internal {
+
+template <>
+FixedArray* NativesCollection<CORE>::GetSourceCache(Heap* heap) {
+  return heap->natives_source_cache();
+}
+
+
+template <>
+FixedArray* NativesCollection<EXPERIMENTAL>::GetSourceCache(Heap* heap) {
+  return heap->experimental_natives_source_cache();
+}
+
+
+template <>
+FixedArray* NativesCollection<EXTRAS>::GetSourceCache(Heap* heap) {
+  return heap->extra_natives_source_cache();
+}
+
+
+template <>
+FixedArray* NativesCollection<EXPERIMENTAL_EXTRAS>::GetSourceCache(Heap* heap) {
+  return heap->experimental_extra_natives_source_cache();
+}
+
+
+template <NativeType type>
+void NativesCollection<type>::UpdateSourceCache(Heap* heap) {
+  for (int i = 0; i < GetBuiltinsCount(); i++) {
+    Object* source = GetSourceCache(heap)->get(i);
+    if (!source->IsUndefined()) {
+      ExternalOneByteString::cast(source)->update_data_cache();
+    }
+  }
+}
+
+
+// Explicit template instantiations.
+template void NativesCollection<CORE>::UpdateSourceCache(Heap* heap);
+template void NativesCollection<EXPERIMENTAL>::UpdateSourceCache(Heap* heap);
+template void NativesCollection<EXTRAS>::UpdateSourceCache(Heap* heap);
+template void NativesCollection<EXPERIMENTAL_EXTRAS>::UpdateSourceCache(
+    Heap* heap);
+
+}  // namespace internal
+}  // namespace v8