Devirtualize PageConsole and MHTMLArchive destructors

Source/core/page/PageConsole.cpp

 /*
  * Copyright (C) 2013 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 37 matching lines @@
 
 int muteCount = 0;
 
 }
 
 PageConsole::PageConsole(Page* page)
     : m_page(page)
 {
 }
 
-PageConsole::~PageConsole() { }
-
 void PageConsole::addMessage(MessageSource source, MessageLevel level, const String& message)
 {
     addMessage(source, level, message, String(), 0, 0, 0, 0, 0);
 }
 
 void PageConsole::addMessage(MessageSource source, MessageLevel level, const String& message, PassRefPtr<ScriptCallStack> callStack)
 {
     addMessage(source, level, message, String(), 0, 0, callStack, 0);
 }
 
@@ skipping 48 matching lines @@
     muteCount++;
 }
 
 void PageConsole::unmute()
 {
     ASSERT(muteCount > 0);
     muteCount--;
 }
 
 } // namespace WebCore