Implement languagechange event, fired when accept languages changes.

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.
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 79 matching lines @@
         for (LocalFrame* frame = (*it)->mainFrame(); frame; frame = frame->tree().traverseNext())
             frames.append(frame);
         InspectorInstrumentation::networkStateChanged(*it, online);
     }
 
     AtomicString eventName = online ? EventTypeNames::online : EventTypeNames::offline;
     for (unsigned i = 0; i < frames.size(); i++)
         frames[i]->domWindow()->dispatchEvent(Event::create(eventName));
 }
 
+void Page::acceptLanguagesChanged()
+{
+    for (LocalFrame* frame = mainFrame(); frame; frame = frame->tree().traverseNext()) {

[jochen (gone - plz use gerrit), 2014/05/21 09:20:11]

no need for { }

[mlamouri (slow - plz ping), 2014/05/21 16:27:55]

Done.

+        frame->domWindow()->dispatchEvent(Event::create(EventTypeNames::languagechange));

[jochen (gone - plz use gerrit), 2014/05/21 09:20:11]

js execution could change the frames, so you should first copy all frames to a
Vector<RefPtr<LocalFrame> > and then iterate over that vector

[mlamouri (slow - plz ping), 2014/05/21 16:27:55]

Done.

+    }
+}
+
 float deviceScaleFactor(LocalFrame* frame)
 {
     if (!frame)
         return 1;
     Page* page = frame->page();
     if (!page)
         return 1;
     return page->deviceScaleFactor();
 }
 
@@ skipping 474 matching lines @@
     , spellCheckerClient(0)
     , storageClient(0)
 {
 }
 
 Page::PageClients::~PageClients()
 {
 }
 
 } // namespace WebCore