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

ash/test/test_suite.h

Index: ash/test/test_suite.h
diff --git a/ash/test/test_suite.h b/ash/test/test_suite.h
index 6da394d3d9d9ef4765ad37cd475ede87928a5a66..44e043caadc8cf1ed030fc4cbe0fcdba87f49c62 100644
--- a/ash/test/test_suite.h
+++ b/ash/test/test_suite.h
@@ -13,10 +13,6 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/win/scoped_com_initializer.h"
 #endif
-
-namespace aura {
-class Env;
-}
 
 namespace ash {
 namespace test {
@@ -35,7 +31,6 @@
 #if defined(OS_WIN)
   scoped_ptr<base::win::ScopedCOMInitializer> com_initializer_;
 #endif
-  scoped_ptr<aura::Env> env_;
 
   base::TestDiscardableMemoryAllocator discardable_memory_allocator_;
 };