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

third_party/WebKit/Source/core/page/ValidationMessageClientImpl.cpp

 /*
  * 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 97 matching lines @@
   finish_time_ = 0;
   web_view_.Client()->HideValidationMessage();
   web_view_.GetChromeClient().UnregisterPopupOpeningObserver(this);
 }
 
 bool ValidationMessageClientImpl::IsValidationMessageVisible(
     const Element& anchor) {
   return current_anchor_ == &anchor;
 }
 
+void ValidationMessageClientImpl::WillUnloadDocument(const Document& document) {
+  if (current_anchor_ && current_anchor_->GetDocument() == document)
+    HideValidationMessage(*current_anchor_);
+}
+
+void ValidationMessageClientImpl::DocumentDetached(const Document& document) {
+  DCHECK(!current_anchor_ || current_anchor_->GetDocument() != document)
+      << "willUnloadDocument() should be called beforehand.";
+}
+
 void ValidationMessageClientImpl::CheckAnchorStatus(TimerBase*) {
   DCHECK(current_anchor_);
   if (MonotonicallyIncreasingTime() >= finish_time_ || !CurrentView()) {
     HideValidationMessage(*current_anchor_);
     return;
   }
 
   IntRect new_anchor_rect_in_viewport =
       current_anchor_->VisibleBoundsInVisualViewport();
   if (new_anchor_rect_in_viewport.IsEmpty()) {
@@ skipping 21 matching lines @@
   if (current_anchor_)
     HideValidationMessage(*current_anchor_);
 }
 
 DEFINE_TRACE(ValidationMessageClientImpl) {
   visitor->Trace(current_anchor_);
   ValidationMessageClient::Trace(visitor);
 }
 
 }  // namespace blink