[Sync] Clean up ProfileSyncService observer events

chrome/browser/sync/glue/sync_backend_host_impl.cc

 // 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.
 
 #include "chrome/browser/sync/glue/sync_backend_host_impl.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 608 matching lines @@
       base::Bind(&SyncBackendHostCore::DoRefreshTypes, core_.get(), types));
 }
 
 void SyncBackendHostImpl::AddExperimentalTypes() {
   CHECK(initialized());
   syncer::Experiments experiments;
   if (core_->sync_manager()->ReceivedExperiment(&experiments))
     frontend_->OnExperimentsChanged(experiments);
 }
 
-void SyncBackendHostImpl::HandleControlTypesDownloadRetry() {
-  DCHECK_EQ(base::MessageLoop::current(), frontend_loop_);
-  if (!frontend_)
-    return;
-
-  frontend_->OnSyncConfigureRetry();
-}
-
 void SyncBackendHostImpl::HandleInitializationSuccessOnFrontendLoop(
     const syncer::WeakHandle<syncer::JsBackend> js_backend,
     const syncer::WeakHandle<syncer::DataTypeDebugInfoListener>
         debug_info_listener,
     syncer::SyncContextProxy* sync_context_proxy,
     const std::string& cache_guid) {
   DCHECK_EQ(base::MessageLoop::current(), frontend_loop_);
 
   if (sync_context_proxy)
     sync_context_proxy_ = sync_context_proxy->Clone();
@@ skipping 224 matching lines @@
 
 base::MessageLoop* SyncBackendHostImpl::GetSyncLoopForTesting() {
   return registrar_->sync_thread()->message_loop();
 }
 
 }  // namespace browser_sync
 
 #undef SDVLOG
 
 #undef SLOG