Oilpan: fix build after r181083

Source/core/frame/FrameConsole.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;
 
 }
 
 FrameConsole::FrameConsole(LocalFrame& frame)
     : m_frame(frame)
 {
 }
 
-FrameConsole::~FrameConsole()
-{
-}
-
 void FrameConsole::addMessage(PassRefPtrWillBeRawPtr<ConsoleMessage> prpConsoleMessage)
 {
     RefPtrWillBeRawPtr<ConsoleMessage> consoleMessage = prpConsoleMessage;
     if (muteCount && consoleMessage->source() != ConsoleAPIMessageSource)
         return;
 
     // FIXME: This should not need to reach for the main-frame.
     // Inspector code should just take the current frame and know how to walk itself.
     ExecutionContext* context = m_frame.document();
     if (!context)
@@ skipping 76 matching lines @@
     if (!m_consoleMessageStorage)
         m_consoleMessageStorage = ConsoleMessageStorage::createForFrame(&m_frame);
     return m_consoleMessageStorage.get();
 }
 
 void FrameConsole::adoptWorkerConsoleMessages(WorkerGlobalScopeProxy* proxy)
 {
     InspectorInstrumentation::adoptWorkerConsoleMessages(m_frame.document(), proxy);
 }
 
+void FrameConsole::trace(Visitor* visitor)
+{
+    visitor->trace(m_consoleMessageStorage);
+}
+
 } // namespace blink