aura: Require explicit ownership of the Env instance.

ui/wm/test/run_all_unittests.cc

Index: ui/wm/test/run_all_unittests.cc
diff --git a/ui/wm/test/run_all_unittests.cc b/ui/wm/test/run_all_unittests.cc
index 24e0fa214e58d9e1132950b6279b745b64dc9fdc..be780e8a9352cfc647d22267acc6f25d51ef1ba8 100644
--- a/ui/wm/test/run_all_unittests.cc
+++ b/ui/wm/test/run_all_unittests.cc
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <memory>
+
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
@@ -9,6 +11,7 @@
 #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"
@@ -26,14 +29,18 @@ class WMTestSuite : public base::TestSuite {
     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:
+  std::unique_ptr<aura::Env> env_;
   DISALLOW_COPY_AND_ASSIGN(WMTestSuite);
 };