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

chrome/browser/sync/js_event_details.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_event_details.h"
-
-#include "base/json/json_writer.h"
-
-namespace browser_sync {
-
-JsEventDetails::JsEventDetails()
-    : details_(new SharedValue<DictionaryValue>()) {}
-
-JsEventDetails::JsEventDetails(DictionaryValue* details)
-    : details_(new SharedValue<DictionaryValue>(details)) {}
-
-JsEventDetails::~JsEventDetails() {}
-
-const DictionaryValue& JsEventDetails::Get() const {
-  return details_->Get();
-}
-
-std::string JsEventDetails::ToString() const {
-  std::string str;
-  base::JSONWriter::Write(&Get(), false, &str);
-  return str;
-}
-
-}  // namespace browser_sync