Revert of Move navigation-induced hiding of form-validation-bubble to the browser process.

third_party/WebKit/Source/core/page/ValidationMessageClient.h

 /*
  * Copyright (C) 2012 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
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 14 matching lines @@
 
 #ifndef ValidationMessageClient_h
 #define ValidationMessageClient_h
 
 #include "platform/heap/Handle.h"
 #include "platform/text/TextDirection.h"
 #include "platform/wtf/Forward.h"
 
 namespace blink {
 
+class Document;
 class Element;
 
 class ValidationMessageClient : public GarbageCollectedMixin {
  public:
   virtual ~ValidationMessageClient() {}
 
   // Show validation message for the specified anchor element. An
   // implementation of this function may hide the message automatically after
   // some period.
   virtual void ShowValidationMessage(const Element& anchor,
                                      const String& main_message,
                                      TextDirection,
                                      const String& sub_message,
                                      TextDirection) = 0;
 
   // Hide validation message for the specified anchor if the message for the
   // anchor is already visible.
   virtual void HideValidationMessage(const Element& anchor) = 0;
 
   // Returns true if the validation message for the specified anchor element
   // is visible.
   virtual bool IsValidationMessageVisible(const Element& anchor) = 0;
 
+  virtual void WillUnloadDocument(const Document&) = 0;
+  virtual void DocumentDetached(const Document&) = 0;
+
   virtual void WillBeDestroyed() = 0;
 
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 };
 
 }  // namespace blink
 
 #endif