Disallow [in]equality operator for PageTransition

ui/base/page_transition_types.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_BASE_PAGE_TRANSITION_TYPES_H_
 #define UI_BASE_PAGE_TRANSITION_TYPES_H_
 
 #include <stdint.h>
 
 #include "ui/base/ui_base_export.h"
@@ skipping 168 matching lines @@
 UI_BASE_EXPORT int32_t PageTransitionGetQualifier(PageTransition type);
 
 // Returns true if the transition can be triggered by the web instead of
 // through UI or similar.
 UI_BASE_EXPORT bool PageTransitionIsWebTriggerable(PageTransition type);
 
 // Return a string version of the core type values.
 UI_BASE_EXPORT const char* PageTransitionGetCoreTransitionString(
     PageTransition type);
 
-// TODO(joth): Remove the #if guard here; requires all chrome layer code to
-// be fixed up not to use operator==
-#if defined(CONTENT_IMPLEMENTATION)
 // Declare a dummy class that is intentionally never defined.
 class DontUseOperatorEquals;
 
-// Ban operator== as it's way too easy to forget to strip the qualifiers. Use
-// PageTransitionCoreTypeIs() instead or, in rare cases,
+// Ban operator== and operator!= as it's way too easy to forget to strip the
+// qualifiers. Use PageTransitionCoreTypeIs() instead or, in rare cases,
 // PageTransitionTypeIncludingQualifiersIs().
 DontUseOperatorEquals operator==(PageTransition, PageTransition);
 DontUseOperatorEquals operator==(PageTransition, int);
 DontUseOperatorEquals operator==(int, PageTransition);
-#endif  // defined(CONTENT_IMPLEMENTATION)
+DontUseOperatorEquals operator!=(PageTransition, PageTransition);
+DontUseOperatorEquals operator!=(PageTransition, int);
+DontUseOperatorEquals operator!=(int, PageTransition);
 
 }  // namespace ui
 
 #endif  // UI_BASE_PAGE_TRANSITION_TYPES_H_