aura: Require explicit ownership of the Env instance.

chrome/test/base/view_event_test_platform_part_chromeos.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/test/base/view_event_test_platform_part.h"
 
 #include "ash/shell.h"
 #include "ash/shell_init_params.h"
 #include "ash/test/ash_test_helper.h"
 #include "ash/test/test_session_state_delegate.h"
@@ skipping 15 matching lines @@
       ui::ContextFactory* context_factory);
   ~ViewEventTestPlatformPartChromeOS() override;
 
   // Overridden from ViewEventTestPlatformPart:
   gfx::NativeWindow GetContext() override {
     return ash::Shell::GetPrimaryRootWindow();
   }
 
  private:
   wm::WMState wm_state_;
+  scoped_ptr<aura::Env> env_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewEventTestPlatformPartChromeOS);
 };
 
 ViewEventTestPlatformPartChromeOS::ViewEventTestPlatformPartChromeOS(
     ui::ContextFactory* context_factory) {
   // Ash Shell can't just live on its own without a browser process, we need to
   // also create the message center.
   message_center::MessageCenter::Initialize();
   chromeos::DBusThreadManager::Initialize();
   chromeos::CrasAudioHandler::InitializeForTesting();
   chromeos::NetworkHandler::Initialize();
 
-  aura::Env::CreateInstance(true);
+  env_ = aura::Env::CreateInstance();
   ash::test::TestShellDelegate* shell_delegate =
       new ash::test::TestShellDelegate();
   ash::ShellInitParams init_params;
   init_params.delegate = shell_delegate;
   init_params.context_factory = context_factory;
   ash::Shell::CreateInstance(init_params);
   ash::test::AshTestHelper::GetTestSessionStateDelegate()->
       SetActiveUserSessionStarted(true);
   GetContext()->GetHost()->Show();
 }
 
 ViewEventTestPlatformPartChromeOS::~ViewEventTestPlatformPartChromeOS() {
   ash::Shell::DeleteInstance();
-  aura::Env::DeleteInstance();
+  env_.reset();
 
   chromeos::NetworkHandler::Shutdown();
   chromeos::CrasAudioHandler::Shutdown();
   chromeos::DBusThreadManager::Shutdown();
   // Ash Shell can't just live on its own without a browser process, we need to
   // also shut down the message center.
   message_center::MessageCenter::Shutdown();
 }
 
 }  // namespace
 
 // static
 ViewEventTestPlatformPart* ViewEventTestPlatformPart::Create(
     ui::ContextFactory* context_factory) {
   return new ViewEventTestPlatformPartChromeOS(context_factory);
 }