[USS] Move GetAllNodes from backend to controller

components/sync/driver/glue/sync_backend_host.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 COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_H_
 #define COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 185 matching lines @@
 
   // Requests that the backend forward to the fronent any protocol events in
   // its buffer and begin forwarding automatically from now on.  Repeated calls
   // to this function may result in the same events being emitted several
   // times.
   virtual void RequestBufferedProtocolEventsAndEnableForwarding() = 0;
 
   // Disables protocol event forwarding.
   virtual void DisableProtocolEventForwarding() = 0;
 
-  // Returns a ListValue representing all nodes for the specified types through
-  // |callback| on this thread.
-  virtual void GetAllNodesForTypes(
-      syncer::ModelTypeSet types,
-      base::Callback<void(const std::vector<syncer::ModelType>&,
-                          std::vector<std::unique_ptr<base::ListValue>>)>
-          type) = 0;
-
   // Enables the sending of directory type debug counters.  Also, for every
   // time it is called, it makes an explicit request that updates to an update
   // for all counters be emitted.
   virtual void EnableDirectoryTypeDebugInfoForwarding() = 0;
 
   // Disables the sending of directory type debug counters.
   virtual void DisableDirectoryTypeDebugInfoForwarding() = 0;
 
   virtual base::MessageLoop* GetSyncLoopForTesting() = 0;
 
   // Triggers sync cycle to update |types|.
   virtual void RefreshTypesForTest(syncer::ModelTypeSet types) = 0;
 
   // See SyncManager::ClearServerData.
   virtual void ClearServerData(
       const syncer::SyncManager::ClearServerDataCallback& callback) = 0;
 
   // Notify the syncer that the cookie jar has changed.
   // See SyncManager::OnCookieJarChanged.
   virtual void OnCookieJarChanged(bool account_mismatch, bool empty_jar) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHost);
 };
 
 }  // namespace browser_sync
 
 #endif  // COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_H_