Do not spawn a thread in browser/interactive ui tests before spawning sandbox host process

chrome/browser/chromeos/login/screen_locker_browsertest.cc

 // Copyright (c) 2012 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/chromeos/login/screen_locker.h"
 
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 103 matching lines @@
                     notify_lock_screen_dismissed_call_count();
   }
 
  private:
   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
     FakeDBusThreadManager* fake_dbus_thread_manager = new FakeDBusThreadManager;
     fake_dbus_thread_manager->SetFakeClients();
     fake_session_manager_client_ = new FakeSessionManagerClient;
     fake_dbus_thread_manager->SetSessionManagerClient(
         scoped_ptr<SessionManagerClient>(fake_session_manager_client_));
-    DBusThreadManager::InitializeForTesting(fake_dbus_thread_manager);
+    DBusThreadManager::SetInstanceForTesting(fake_dbus_thread_manager);
 
     InProcessBrowserTest::SetUpInProcessBrowserTestFixture();
     zero_duration_mode_.reset(new ui::ScopedAnimationDurationScaleMode(
         ui::ScopedAnimationDurationScaleMode::ZERO_DURATION));
   }
 
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     command_line->AppendSwitchASCII(switches::kLoginProfile, "user");
   }
 
@@ skipping 116 matching lines @@
   EXPECT_EQ("", tester->GetPassword());
 
   // Close the locker to match expectations.
   ScreenLocker::Hide();
   content::RunAllPendingInMessageLoop();
   EXPECT_FALSE(tester->IsLocked());
   EXPECT_TRUE(VerifyLockScreenDismissed());
 }
 
 }  // namespace chromeos