sync: null-check ProfileManager in sync_start_util

chrome/browser/sync/glue/sync_start_util.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_start_util.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace {
 
 void StartSyncOnUIThread(const base::FilePath& profile,
                          syncer::ModelType type) {
   ProfileManager* profile_manager = g_browser_process->profile_manager();
+  if (!profile_manager) {
+    // Can happen in tests.
+    DVLOG(2) << "No ProfileManager, can't start sync.";
+    return;
+  }
+
   Profile* p = profile_manager->GetProfileByPath(profile);
   if (!p) {
     DVLOG(2) << "Profile not found, can't start sync.";
     return;
   }
 
   ProfileSyncService* service = ProfileSyncServiceFactory::GetForProfile(p);
   if (!service) {
     DVLOG(2) << "No ProfileSyncService for profile, can't start sync.";
     return;
@@ skipping 11 matching lines @@
 }  // namespace
 
 namespace sync_start_util {
 
 syncer::SyncableService::StartSyncFlare GetFlareForSyncableService(
     const base::FilePath& profile_path) {
   return base::Bind(&StartSyncProxy, profile_path);
 }
 
 }  // namespace sync_start_util