Ensure tests have an active task runner

chrome/browser/extensions/extension_service_test_base.cc

 // Copyright 2014 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/extensions/extension_service_test_base.h"
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 55 matching lines @@
 }  // namespace
 
 ExtensionServiceTestBase::ExtensionServiceInitParams::
     ExtensionServiceInitParams()
     : autoupdate_enabled(false),
       is_first_run(true),
       profile_is_supervised(false) {
 }
 
 ExtensionServiceTestBase::ExtensionServiceTestBase()
-    : service_(NULL),
+    : thread_bundle_(new content::TestBrowserThreadBundle(kThreadOptions)),
+      service_(NULL),
       testing_local_state_(TestingBrowserProcess::GetGlobal()),
-      thread_bundle_(new content::TestBrowserThreadBundle(kThreadOptions)),
       did_reset_thread_bundle_(false),
       registry_(NULL) {
   base::FilePath test_data_dir;
   if (!PathService::Get(chrome::DIR_TEST_DATA, &test_data_dir)) {
     ADD_FAILURE();
     return;
   }
   data_dir_ = test_data_dir.AppendASCII("extensions");
 }
 
@@ skipping 143 matching lines @@
   // interfere with the tests. Those tests that need an external provider
   // will register one specifically.
   service_->ClearProvidersForTesting();
 
 #if defined(OS_CHROMEOS)
   InstallLimiter::Get(profile_.get())->DisableForTest();
 #endif
 }
 
 }  // namespace extensions