Don't include LayoutObject-derived headers where not needed.

third_party/WebKit/Source/core/html/HTMLMeterElement.cpp

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 12 matching lines @@
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "core/HTMLNames.h"
 #include "core/dom/NodeComputedStyle.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/frame/UseCounter.h"
 #include "core/html/HTMLContentElement.h"
 #include "core/html/HTMLDivElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
-#include "core/layout/LayoutObject.h"
 #include "core/style/ComputedStyle.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 HTMLMeterElement::HTMLMeterElement(Document& document)
     : LabelableElement(meterTag, document) {
   UseCounter::count(document, UseCounter::MeterElement);
 }
@@ skipping 11 matching lines @@
     case MeterPart:
       UseCounter::count(document(),
                         UseCounter::MeterElementWithMeterAppearance);
       break;
     case NoControlPart:
       UseCounter::count(document(), UseCounter::MeterElementWithNoneAppearance);
       break;
     default:
       break;
   }
-  return LayoutObject::createObject(this, style);
+  return LabelableElement::createLayoutObject(style);
 }
 
 void HTMLMeterElement::parseAttribute(const QualifiedName& name,
                                       const AtomicString& oldValue,
                                       const AtomicString& value) {
   if (name == valueAttr || name == minAttr || name == maxAttr ||
       name == lowAttr || name == highAttr || name == optimumAttr)
     didElementStateChange();
   else
     LabelableElement::parseAttribute(name, oldValue, value);
@@ skipping 147 matching lines @@
   document().updateStyleAndLayoutTreeForNode(this);
   return computedStyle() && !computedStyle()->hasAppearance();
 }
 
 DEFINE_TRACE(HTMLMeterElement) {
   visitor->trace(m_value);
   LabelableElement::trace(visitor);
 }
 
 }  // namespace blink