Wire sync shutdown reason from PSS all the way down to sync manager.

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 257 matching lines @@
   // Stop non-blocking sync types from sending any more requests to the syncer.
   sync_context_proxy_.reset();
 
   DCHECK(registrar_->sync_thread()->IsRunning());
 
   registrar_->RequestWorkerStopOnUIThread();
 
   core_->ShutdownOnUIThread();
 }
 
-scoped_ptr<base::Thread> SyncBackendHostImpl::Shutdown(ShutdownOption option) {
+scoped_ptr<base::Thread> SyncBackendHostImpl::Shutdown(
+    syncer::ShutdownReason reason) {
   // StopSyncingForShutdown() (which nulls out |frontend_|) should be
   // called first.
   DCHECK(!frontend_);
   DCHECK(registrar_->sync_thread()->IsRunning());
 
-  bool sync_disabled = (option == DISABLE_AND_CLAIM_THREAD);
-  bool sync_thread_claimed =
-      (option == DISABLE_AND_CLAIM_THREAD || option == STOP_AND_CLAIM_THREAD);
+  bool sync_thread_claimed = (reason != syncer::BROWSER_SHUTDOWN);
 
   if (invalidation_handler_registered_) {
-    if (sync_disabled) {
+    if (reason == syncer::DISABLE_SYNC) {
       UnregisterInvalidationIds();
     }
     invalidator_->UnregisterInvalidationHandler(this);
     invalidator_ = NULL;
   }
   invalidation_handler_registered_ = false;
 
   // Shut down and destroy sync manager.
   registrar_->sync_thread()->message_loop()->PostTask(
       FROM_HERE,
       base::Bind(&SyncBackendHostCore::DoShutdown,
-                 core_.get(), sync_disabled));
+                 core_.get(), reason));
   core_ = NULL;
 
   // Worker cleanup.
   SyncBackendRegistrar* detached_registrar = registrar_.release();
   detached_registrar->sync_thread()->message_loop()->PostTask(
       FROM_HERE,
       base::Bind(&SyncBackendRegistrar::Shutdown,
                  base::Unretained(detached_registrar)));
 
   if (sync_thread_claimed)
@@ skipping 573 matching lines @@
 
 base::MessageLoop* SyncBackendHostImpl::GetSyncLoopForTesting() {
   return registrar_->sync_thread()->message_loop();
 }
 
 }  // namespace browser_sync
 
 #undef SDVLOG
 
 #undef SLOG