:hover style not applied on hover if its display property is different from original style's

Source/core/html/shadow/TextControlInnerElements.h

 /*
  * Copyright (C) 2006, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 73 matching lines @@
 class SearchFieldCancelButtonElement FINAL : public HTMLDivElement {
 public:
     static PassRefPtr<SearchFieldCancelButtonElement> create(Document*);
 
     virtual void defaultEventHandler(Event*);
     virtual bool willRespondToMouseClickEvents() OVERRIDE;
 
 private:
     SearchFieldCancelButtonElement(Document*);
     virtual const AtomicString& shadowPseudoId() const;
-    virtual void detach();
+    virtual void detach(const AttachContext& = AttachContext()) OVERRIDE;
     virtual bool isMouseFocusable() const { return false; }
 
     bool m_capturing;
 };
 
 #if ENABLE(INPUT_SPEECH)
 
 class InputFieldSpeechButtonElement FINAL
     : public HTMLDivElement,
       public SpeechInputListener {
 public:
     enum SpeechInputState {
         Idle,
         Recording,
         Recognizing,
     };
 
     static PassRefPtr<InputFieldSpeechButtonElement> create(Document*);
     virtual ~InputFieldSpeechButtonElement();
 
-    virtual void detach();
+    virtual void detach(const AttachContext& = AttachContext()) OVERRIDE;
     virtual void defaultEventHandler(Event*);
     virtual bool willRespondToMouseClickEvents();
     virtual bool isInputFieldSpeechButtonElement() const { return true; }
     SpeechInputState state() const { return m_state; }
     void startSpeechInput();
     void stopSpeechInput();
 
     // SpeechInputListener methods.
     void didCompleteRecording(int);
     void didCompleteRecognition(int);
     void setRecognitionResult(int, const SpeechInputResultArray&);
 
 private:
     InputFieldSpeechButtonElement(Document*);
     SpeechInput* speechInput();
     void setState(SpeechInputState state);
     virtual const AtomicString& shadowPseudoId() const;
     virtual bool isMouseFocusable() const { return false; }
-    virtual void attach();
+    virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
 
     bool m_capturing;
     SpeechInputState m_state;
     int m_listenerId;
     SpeechInputResultArray m_results;
 };
 
 inline InputFieldSpeechButtonElement* toInputFieldSpeechButtonElement(Element* element)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!element || element->isInputFieldSpeechButtonElement());
     return static_cast<InputFieldSpeechButtonElement*>(element);
 }
 
 #endif // ENABLE(INPUT_SPEECH)
 
 } // namespace
 
 #endif