Explicit initialization of aura::Env for browser shell.

ui/aura/bench/bench_main.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 "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/i18n/icu_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 290 matching lines @@
 
   // The ContextFactory must exist before any Compositors are created.
   bool allow_test_contexts = false;
   ui::Compositor::InitializeContextFactoryForTests(allow_test_contexts);
 
   ui::RegisterPathProvider();
   base::i18n::InitializeICU();
   ResourceBundle::InitSharedInstanceWithLocale("en-US", NULL);
 
   base::MessageLoop message_loop(base::MessageLoop::TYPE_UI);
-  aura::Env::GetInstance();
+  aura::Env::CreateInstance();
   scoped_ptr<aura::TestScreen> test_screen(
       aura::TestScreen::CreateFullscreen());
   gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, test_screen.get());
   scoped_ptr<aura::RootWindow> root_window(
       test_screen->CreateRootWindowForPrimaryDisplay());
   aura::client::SetCaptureClient(
       root_window.get(),
       new aura::client::DefaultCaptureClient(root_window.get()));
 
   scoped_ptr<aura::client::FocusClient> focus_client(new aura::FocusManager);
@@ skipping 39 matching lines @@
   ui::PrintLayerHierarchy(root_window->layer(), gfx::Point(100, 100));
 #endif
 
   root_window->ShowRootWindow();
   base::MessageLoopForUI::current()->Run();
   focus_client.reset();
   root_window.reset();
 
   return 0;
 }