sync: Move all the js_* files into a js/ subdirectory.

chrome/browser/sync/js_arg_list.cc

-// Copyright (c) 2011 The Chromium 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 "chrome/browser/sync/js_arg_list.h"
-
-#include "base/json/json_writer.h"
-
-namespace browser_sync {
-
-JsArgList::JsArgList() : args_(new SharedValue<ListValue>()) {}
-
-JsArgList::JsArgList(ListValue* args)
-    : args_(new SharedValue<ListValue>(args)) {}
-
-JsArgList::~JsArgList() {}
-
-const ListValue& JsArgList::Get() const {
-  return args_->Get();
-}
-
-std::string JsArgList::ToString() const {
-  std::string str;
-  base::JSONWriter::Write(&Get(), false, &str);
-  return str;
-}
-
-}  // namespace browser_sync