Revert of 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 94af206d17c93823d779b4366882656ae9e27e69..970da37dce37f81b465ae984d3dd47394541bf0b 100644
--- a/ui/wm/test/run_all_unittests.cc
+++ b/ui/wm/test/run_all_unittests.cc
@@ -9,7 +9,6 @@
 #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"
@@ -27,18 +26,14 @@
     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);
 };