Revert "chromeos: Add a bool flag to catch crash cause of http://crbug.com/134507."

ui/aura/window.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_AURA_WINDOW_H_
 #define UI_AURA_WINDOW_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 461 matching lines @@
   // Key cannot be used for this purpose because it can be char* or
   // WindowProperty<>.
   struct Value {
     const char* name;
     intptr_t value;
     PropertyDeallocator deallocator;
   };
 
   std::map<const void*, Value> prop_map_;
 
-  // A boolean flag to debug crash in http://crbug.com/134507. It is set when
-  // SetVisible is called and reset when SetVisible finishes. In Window dtor,
-  // the flag is CHECKed to catch the case that Window is destroyed during
-  // SetVisbile(false).
-  // TODO(xiyuan): Remove this when http://crbug.com/134507 is resolved.
-  bool in_set_visible_call_;
-
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_H_