aura: Require explicit ownership of the Env instance.

content/public/test/unittest_test_suite.cc

Index: content/public/test/unittest_test_suite.cc
diff --git a/content/public/test/unittest_test_suite.cc b/content/public/test/unittest_test_suite.cc
index 573838aad9ba45d450c3eb4cddeb9e60f7c858bb..1a717701c0ab7f248034db91617088f110b47bfe 100644
--- a/content/public/test/unittest_test_suite.cc
+++ b/content/public/test/unittest_test_suite.cc
@@ -30,8 +30,7 @@ UnitTestTestSuite::UnitTestTestSuite(base::TestSuite* test_suite)
 #endif
 #if defined(USE_AURA)
   DCHECK(!aura::Env::GetInstanceDontCreate());
-  const bool create_event_source = true;
-  aura::Env::CreateInstance(create_event_source);
+  env_ = aura::Env::CreateInstance();
 #endif
   DCHECK(test_suite);
 #if !defined(OS_IOS)
@@ -44,7 +43,7 @@ UnitTestTestSuite::~UnitTestTestSuite() {
   blink_test_support_.reset();
 #endif
 #if defined(USE_AURA)
-  aura::Env::DeleteInstance();
+  env_.reset();
 #endif
 }