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

chrome/test/base/view_event_test_platform_part_chromeos.cc

Index: chrome/test/base/view_event_test_platform_part_chromeos.cc
diff --git a/chrome/test/base/view_event_test_platform_part_chromeos.cc b/chrome/test/base/view_event_test_platform_part_chromeos.cc
index d51732e7715f689570ca04189aad4cd764073a1c..3767dda75eaf3f2f55ae211b56d296b622cd40dc 100644
--- a/chrome/test/base/view_event_test_platform_part_chromeos.cc
+++ b/chrome/test/base/view_event_test_platform_part_chromeos.cc
@@ -33,7 +33,6 @@
 
  private:
   wm::WMState wm_state_;
-  scoped_ptr<aura::Env> env_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewEventTestPlatformPartChromeOS);
 };
@@ -47,7 +46,7 @@
   chromeos::CrasAudioHandler::InitializeForTesting();
   chromeos::NetworkHandler::Initialize();
 
-  env_ = aura::Env::CreateInstance();
+  aura::Env::CreateInstance(true);
   ash::test::TestShellDelegate* shell_delegate =
       new ash::test::TestShellDelegate();
   ash::ShellInitParams init_params;
@@ -61,7 +60,7 @@
 
 ViewEventTestPlatformPartChromeOS::~ViewEventTestPlatformPartChromeOS() {
   ash::Shell::DeleteInstance();
-  env_.reset();
+  aura::Env::DeleteInstance();
 
   chromeos::NetworkHandler::Shutdown();
   chromeos::CrasAudioHandler::Shutdown();