[USS] Move GetAllNodes from backend to controller

components/sync/core_impl/sync_manager_impl.cc

 // Copyright (c) 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.
 
 #include "components/sync/core_impl/sync_manager_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <string>
@@ skipping 834 matching lines @@
   FOR_EACH_OBSERVER(SyncManager::Observer, observers_, OnProtocolEvent(event));
 }
 
 void SyncManagerImpl::SetJsEventHandler(
     const WeakHandle<JsEventHandler>& event_handler) {
   js_sync_manager_observer_.SetJsEventHandler(event_handler);
   js_mutation_event_observer_.SetJsEventHandler(event_handler);
   js_sync_encryption_handler_observer_.SetJsEventHandler(event_handler);
 }
 
-std::unique_ptr<base::ListValue> SyncManagerImpl::GetAllNodesForType(
-    syncer::ModelType type) {
-  DirectoryTypeDebugInfoEmitterMap* emitter_map =
-      model_type_registry_->directory_type_debug_info_emitter_map();
-  DirectoryTypeDebugInfoEmitterMap::iterator it = emitter_map->find(type);
-
-  if (it == emitter_map->end()) {
-    // This can happen in some cases.  The UI thread makes requests of us
-    // when it doesn't really know which types are enabled or disabled.
-    DLOG(WARNING) << "Asked to return debug info for invalid type "
-                  << ModelTypeToString(type);
-    return std::unique_ptr<base::ListValue>(new base::ListValue());
-  }
-
-  return it->second->GetAllNodes();
-}
-
 void SyncManagerImpl::SetInvalidatorEnabled(bool invalidator_enabled) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   DVLOG(1) << "Invalidator enabled state is now: " << invalidator_enabled;
   allstatus_.SetNotificationsEnabled(invalidator_enabled);
   scheduler_->SetNotificationsEnabled(invalidator_enabled);
 }
 
 void SyncManagerImpl::OnIncomingInvalidation(
     syncer::ModelType type,
@@ skipping 126 matching lines @@
 }
 
 void SyncManagerImpl::OnCookieJarChanged(bool account_mismatch,
                                          bool empty_jar) {
   DCHECK(thread_checker_.CalledOnValidThread());
   cycle_context_->set_cookie_jar_mismatch(account_mismatch);
   cycle_context_->set_cookie_jar_empty(empty_jar);
 }
 
 }  // namespace syncer