Serializer: move to a subfolder and clean up includes.

src/snapshot/natives-external.cc

 // Copyright 2014 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/natives.h"
+#include "src/snapshot/natives.h"
 
 #include "src/base/logging.h"
 #include "src/list.h"
 #include "src/list-inl.h"
-#include "src/snapshot-source-sink.h"
+#include "src/snapshot/snapshot-source-sink.h"
 #include "src/vector.h"
 
 #ifndef V8_USE_EXTERNAL_STARTUP_DATA
 #error natives-external.cc is used only for the external snapshot build.
 #endif  // V8_USE_EXTERNAL_STARTUP_DATA
 
 
 namespace v8 {
 namespace internal {
 
@@ skipping 204 matching lines @@
 }
 
 
 // The compiler can't 'see' all uses of the static methods and hence
 // my choice to elide them. This we'll explicitly instantiate these.
 template class NativesCollection<CORE>;
 template class NativesCollection<EXPERIMENTAL>;
 
 }  // namespace v8::internal
 }  // namespace v8