Remove frame flattening support as Chromium has no intention of using it

Source/WebKit/chromium/src/WebSettingsImpl.cpp

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 292 matching lines @@
 }
 
 void WebSettingsImpl::setEditableLinkBehaviorNeverLive()
 {
     // FIXME: If you ever need more behaviors than this, then we should probably
     //        define an enum in WebSettings.h and have a switch statement that
     //        translates.  Until then, this is probably fine, though.
     m_settings->setEditableLinkBehavior(WebCore::EditableLinkNeverLive);
 }
 
-void WebSettingsImpl::setFrameFlatteningEnabled(bool enabled)
-{
-    m_settings->setFrameFlatteningEnabled(enabled);
-}
-
 void WebSettingsImpl::setFontRenderingModeNormal()
 {
     // FIXME: If you ever need more behaviors than this, then we should probably
     //        define an enum in WebSettings.h and have a switch statement that
     //        translates.  Until then, this is probably fine, though.
     m_settings->setFontRenderingMode(WebCore::NormalRenderingMode);
 }
 
 void WebSettingsImpl::setAllowUniversalAccessFromFileURLs(bool allow)
 {
@@ skipping 356 matching lines @@
 {
     m_settings->setSelectionIncludesAltImageText(enabled);
 }
 
 void WebSettingsImpl::setSmartInsertDeleteEnabled(bool enabled)
 {
     m_settings->setSmartInsertDeleteEnabled(enabled);
 }
 
 } // namespace WebKit