Remove more oilpan.

sky/engine/core/dom/ExecutionContext.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2012 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:
  * 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 18 matching lines @@
 #include "core/dom/ExecutionContext.h"
 
 #include "core/dom/ContextLifecycleNotifier.h"
 #include "core/events/ErrorEvent.h"
 #include "core/events/EventTarget.h"
 #include "core/inspector/ScriptCallStack.h"
 #include "wtf/MainThread.h"
 
 namespace blink {
 
-class ExecutionContext::PendingException : public DummyBase<ExecutionContext::PendingException> {
+class ExecutionContext::PendingException {
     WTF_MAKE_NONCOPYABLE(PendingException);
 public:
     PendingException(const String& errorMessage, int lineNumber, int columnNumber, int scriptId, const String& sourceURL, PassRefPtr<ScriptCallStack> callStack)
         : m_errorMessage(errorMessage)
         , m_lineNumber(lineNumber)
         , m_columnNumber(columnNumber)
         , m_scriptId(scriptId)
         , m_sourceURL(sourceURL)
         , m_callStack(callStack)
     {
@@ skipping 180 matching lines @@
 {
     return static_cast<ContextLifecycleNotifier&>(LifecycleContext<ExecutionContext>::lifecycleNotifier());
 }
 
 bool ExecutionContext::isIteratingOverObservers() const
 {
     return m_lifecycleNotifier && m_lifecycleNotifier->isIteratingOverObservers();
 }
 
 } // namespace blink