Remove Sync JS generic request/reply framework

sync/js/sync_js_controller.h

 // Copyright 2012 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 SYNC_JS_SYNC_JS_CONTROLLER_H_
 #define SYNC_JS_SYNC_JS_CONTROLLER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "sync/base/sync_export.h"
 #include "sync/internal_api/public/util/weak_handle.h"
-#include "sync/js/js_arg_list.h"
 #include "sync/js/js_controller.h"
 #include "sync/js/js_event_handler.h"
 
 namespace syncer {
 
 class JsBackend;
 
 // A class that mediates between the sync JsEventHandlers and the sync
 // JsBackend.
 class SYNC_EXPORT SyncJsController
     : public JsController, public JsEventHandler,
       public base::SupportsWeakPtr<SyncJsController> {
  public:
   SyncJsController();
 
   virtual ~SyncJsController();
 
   // Sets the backend to route all messages to (if initialized).
   // Sends any queued-up messages if |backend| is initialized.
   void AttachJsBackend(const WeakHandle<JsBackend>& js_backend);
 
   // JsController implementation.
   virtual void AddJsEventHandler(JsEventHandler* event_handler) OVERRIDE;
   virtual void RemoveJsEventHandler(JsEventHandler* event_handler) OVERRIDE;
-  // Queues up any messages that are sent when there is no attached
-  // initialized backend.
-  virtual void ProcessJsMessage(
-      const std::string& name, const JsArgList& args,
-      const WeakHandle<JsReplyHandler>& reply_handler) OVERRIDE;
 
   // JsEventHandler implementation.
   virtual void HandleJsEvent(const std::string& name,
                              const JsEventDetails& details) OVERRIDE;
 
  private:
-  // A struct used to hold the arguments to ProcessJsMessage() for
-  // future invocation.
-  struct PendingJsMessage {
-    std::string name;
-    JsArgList args;
-    WeakHandle<JsReplyHandler> reply_handler;
-
-    PendingJsMessage(const std::string& name, const JsArgList& args,
-                     const WeakHandle<JsReplyHandler>& reply_handler);
-
-    ~PendingJsMessage();
-  };
-
-  typedef std::vector<PendingJsMessage> PendingJsMessageList;
-
   // Sets |js_backend_|'s event handler depending on how many
   // underlying event handlers we have.
   void UpdateBackendEventHandler();
 
   WeakHandle<JsBackend> js_backend_;
   ObserverList<JsEventHandler> js_event_handlers_;
-  PendingJsMessageList pending_js_messages_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncJsController);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_JS_SYNC_JS_CONTROLLER_H_