Coverity: Fix ProfileImportThread::OnImportStart dereferencing importer_ before null check.

chrome/profile_import/profile_import_thread.cc

 // Copyright (c) 2010 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/profile_import/profile_import_thread.h"
 
 #include <algorithm>
 
 #include "base/values.h"
 #include "chrome/browser/importer/importer.h"
@@ skipping 31 matching lines @@
 void ProfileImportThread::OnImportStart(
     const ProfileInfo& profile_info,
     int items,
     const DictionaryValue& localized_strings,
     bool import_to_bookmark_bar) {
   bridge_ = new ExternalProcessImporterBridge(this, localized_strings);
   bridge_->AddRef();  // Balanced in Cleanup().
 
   ImporterList importer_list;
   importer_ = importer_list.CreateImporterByType(profile_info.browser_type);
-  importer_->AddRef();  // Balanced in Cleanup().
-  importer_->set_import_to_bookmark_bar(import_to_bookmark_bar);
-  items_to_import_ = items;
-
   if (!importer_) {
     Send(new ProfileImportProcessHostMsg_Import_Finished(false,
         "Importer could not be created."));
     return;
   }
 
+  importer_->AddRef();  // Balanced in Cleanup().
+  importer_->set_import_to_bookmark_bar(import_to_bookmark_bar);
+  items_to_import_ = items;
+
   // Create worker thread in which importer runs.
   import_thread_.reset(new base::Thread("import_thread"));
   base::Thread::Options options;
   options.message_loop_type = MessageLoop::TYPE_IO;
   if (!import_thread_->StartWithOptions(options)) {
     NOTREACHED();
     Cleanup();
   }
   import_thread_->message_loop()->PostTask(FROM_HERE,
       NewRunnableMethod(importer_, &Importer::StartImport,
@@ skipping 103 matching lines @@
   Send(new ProfileImportProcessHostMsg_NotifyKeywordsReady(urls,
       default_keyword_index, unique_on_host_and_path));
 }
 
 void ProfileImportThread::Cleanup() {
   importer_->Cancel();
   importer_->Release();
   bridge_->Release();
   ChildProcess::current()->ReleaseProcess();
 }