sync: Re-implement getAllNodes WebUI function

chrome/browser/sync/glue/sync_backend_host_core.h

 // Copyright 2013 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_GLUE_SYNC_BACKEND_HOST_CORE_H_
 #define CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_CORE_H_
 
 #include "base/memory/ref_counted.h"
 
 #include "base/timer/timer.h"
@@ skipping 205 matching lines @@
   // time sync is enabled for a user (to prevent accidentally reusing old
   // sync databases), as well as shutdown when you're no longer syncing.
   void DeleteSyncDataFolder();
 
   // We expose this member because it's required in the construction of the
   // HttpBridgeFactory.
   syncer::CancelationSignal* GetRequestContextCancelationSignal() {
     return &release_request_context_signal_;
   }
 
+  void GetAllNodesForTypes(
+      syncer::ModelTypeSet types,
+      scoped_refptr<base::SequencedTaskRunner> task_runner,
+      base::Callback<void(const std::vector<syncer::ModelType>& type,
+                          ScopedVector<base::ListValue>) > callback);
+
  private:
   friend class base::RefCountedThreadSafe<SyncBackendHostCore>;
   friend class SyncBackendHostForProfileSyncTest;
 
   virtual ~SyncBackendHostCore();
 
   // Invoked when initialization of syncapi is complete and we can start
   // our timer.
   // This must be called from the thread on which SaveChanges is intended to
   // be run on; the host's |registrar_->sync_thread()|.
@@ skipping 57 matching lines @@
   bool forward_protocol_events_;
 
   base::WeakPtrFactory<SyncBackendHostCore> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHostCore);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_CORE_H_