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

chrome/browser/sync/js/js_controller.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_CONTROLLER_H_
-#define CHROME_BROWSER_SYNC_JS_CONTROLLER_H_
+#ifndef CHROME_BROWSER_SYNC_JS_JS_CONTROLLER_H_
+#define CHROME_BROWSER_SYNC_JS_JS_CONTROLLER_H_
 #pragma once
 
 // See README.js for design comments.
 
 #include <string>
 
 namespace browser_sync {
 
 class JsArgList;
 class JsEventHandler;
@@ skipping 23 matching lines @@
   virtual void ProcessJsMessage(
       const std::string& name, const JsArgList& args,
       const WeakHandle<JsReplyHandler>& reply_handler) = 0;
 
  protected:
   virtual ~JsController() {}
 };
 
 }  // namespace browser_sync
 
-#endif  // CHROME_BROWSER_SYNC_JS_CONTROLLER_H_
+#endif  // CHROME_BROWSER_SYNC_JS_JS_CONTROLLER_H_