Revert of aura: Require explicit ownership of the Env instance.

ui/wm/test/run_all_unittests.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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/path_service.h"
 #include "base/test/launcher/unit_test_launcher.h"
 #include "base/test/test_suite.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include "ui/aura/env.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
 #include "ui/gl/test/gl_surface_test_support.h"
 
 class WMTestSuite : public base::TestSuite {
  public:
   WMTestSuite(int argc, char** argv) : base::TestSuite(argc, argv) {}
 
  protected:
   void Initialize() override {
     base::TestSuite::Initialize();
     gfx::GLSurfaceTestSupport::InitializeOneOff();
     ui::RegisterPathProvider();
 
     base::FilePath ui_test_pak_path;
     ASSERT_TRUE(PathService::Get(ui::UI_TEST_PAK, &ui_test_pak_path));
     ui::ResourceBundle::InitSharedInstanceWithPakPath(ui_test_pak_path);
-
-    env_ = aura::Env::CreateInstance();
   }
 
   void Shutdown() override {
-    env_.reset();
     ui::ResourceBundle::CleanupSharedInstance();
     base::TestSuite::Shutdown();
   }
 
  private:
-  scoped_ptr<aura::Env> env_;
   DISALLOW_COPY_AND_ASSIGN(WMTestSuite);
 };
 
 int main(int argc, char** argv) {
   WMTestSuite test_suite(argc, argv);
 
   return base::LaunchUnitTests(
       argc, argv, base::Bind(&WMTestSuite::Run, base::Unretained(&test_suite)));
 }