Fix unhandled showGuessPanel editor command

Source/web/WebFrameImpl.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 1175 matching lines @@
     if (pluginContainer && pluginContainer->executeEditCommand(name, value))
         return true;
 
     // moveToBeginningOfDocument and moveToEndfDocument are only handled by WebKit for editable nodes.
     if (!frame()->editor().canEdit() && webName == "moveToBeginningOfDocument")
         return viewImpl()->propagateScroll(ScrollUp, ScrollByDocument);
 
     if (!frame()->editor().canEdit() && webName == "moveToEndOfDocument")
         return viewImpl()->propagateScroll(ScrollDown, ScrollByDocument);
 
+    if (webName == "showGuessPanel") {
+        frame()->editor().showSpellingGuessPanel();
+        return true;
+    }
+
     return frame()->editor().command(webName).execute(value);
 }
 
 bool WebFrameImpl::isCommandEnabled(const WebString& name) const
 {
     ASSERT(frame());
     return frame()->editor().command(name).isEnabled();
 }
 
 void WebFrameImpl::enableContinuousSpellChecking(bool enable)
@@ skipping 1258 matching lines @@
 
         // There is a possibility that the frame being detached was the only
         // pending one. We need to make sure final replies can be sent.
         flushCurrentScopingEffort(m_findRequestIdentifier);
 
         cancelPendingScopingEffort();
     }
 }
 
 } // namespace WebKit