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

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

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All
  * Rights Reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 235 matching lines @@
 
 void Page::SetMainFrame(Frame* main_frame) {
   // Should only be called during initialization or swaps between local and
   // remote frames.
   // FIXME: Unfortunately we can't assert on this at the moment, because this
   // is called in the base constructor for both LocalFrame and RemoteFrame,
   // when the vtables for the derived classes have not yet been setup.
   main_frame_ = main_frame;
 }
 
+void Page::WillUnloadDocument(const Document& document) {
+  if (validation_message_client_)
+    validation_message_client_->WillUnloadDocument(document);
+}
+
 void Page::DocumentDetached(Document* document) {
   pointer_lock_controller_->DocumentDetached(document);
   context_menu_controller_->DocumentDetached(document);
+  if (validation_message_client_)
+    validation_message_client_->DocumentDetached(*document);
   hosts_using_features_.DocumentDetached(*document);
 }
 
 bool Page::OpenedByDOM() const {
   return opened_by_dom_;
 }
 
 void Page::SetOpenedByDOM() {
   opened_by_dom_ = true;
 }
@@ skipping 406 matching lines @@
     : chrome_client(nullptr),
       context_menu_client(nullptr),
       editor_client(nullptr),
       spell_checker_client(nullptr) {}
 
 Page::PageClients::~PageClients() {}
 
 template class CORE_TEMPLATE_EXPORT Supplement<Page>;
 
 }  // namespace blink