Form validation: Validation bubble should be closed on document unload 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 225 matching lines @@
 
 void Page::setMainFrame(Frame* mainFrame) {
   // 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.
   m_mainFrame = mainFrame;
 }
 
+void Page::willUnloadDocument(const Document& document) {
+  if (m_validationMessageClient)
+    m_validationMessageClient->willUnloadDocument(document);
+}
+
 void Page::documentDetached(Document* document) {
   m_pointerLockController->documentDetached(document);
   m_contextMenuController->documentDetached(document);
   if (m_validationMessageClient)
     m_validationMessageClient->documentDetached(*document);
   m_hostsUsingFeatures.documentDetached(*document);
 }
 
 bool Page::openedByDOM() const {
   return m_openedByDOM;
@@ skipping 408 matching lines @@
     : chromeClient(nullptr),
       contextMenuClient(nullptr),
       editorClient(nullptr),
       spellCheckerClient(nullptr) {}
 
 Page::PageClients::~PageClients() {}
 
 template class CORE_TEMPLATE_EXPORT Supplement<Page>;
 
 }  // namespace blink