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

chrome/browser/sync/js_event_details.h

-// 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.
-
-#ifndef CHROME_BROWSER_SYNC_JS_EVENT_DETAILS_H_
-#define CHROME_BROWSER_SYNC_JS_EVENT_DETAILS_H_
-#pragma once
-
-// See README.js for design comments.
-
-#include <string>
-
-#include "base/memory/ref_counted.h"
-#include "base/values.h"
-#include "chrome/browser/sync/shared_value.h"
-
-namespace browser_sync {
-
-// A thread-safe wrapper around an immutable DictionaryValue.  Used
-// for passing around event details to different threads.
-class JsEventDetails {
- public:
-  // Uses an empty dictionary.
-  JsEventDetails();
-
-  // Takes over the data in |details|, leaving |details| empty.
-  explicit JsEventDetails(DictionaryValue* details);
-
-  ~JsEventDetails();
-
-  const DictionaryValue& Get() const;
-
-  std::string ToString() const;
-
-  // Copy constructor and assignment operator welcome.
-
- private:
-  scoped_refptr<const SharedValue<DictionaryValue> > details_;
-};
-
-}  // namespace browser_sync
-
-#endif  // CHROME_BROWSER_SYNC_JS_EVENT_DETAILS_H_