Re-land "Improve support for :read-only and :read-write pseudoclasses".

Source/core/rendering/RenderTheme.cpp

 /**
  * This file is part of the theme implementation for form controls in WebCore.
  *
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Computer, Inc.
  *
  * 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.
  *
@@ skipping 15 matching lines @@
 #include "HTMLNames.h"
 #include "InputTypeNames.h"
 #include "RuntimeEnabledFeatures.h"
 #include "core/dom/Document.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/editing/FrameSelection.h"
 #include "core/fileapi/FileList.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLCollection.h"
 #include "core/html/HTMLDataListElement.h"
+#include "core/html/HTMLFormControlElement.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLMeterElement.h"
 #include "core/html/HTMLOptionElement.h"
 #include "core/html/parser/HTMLParserIdioms.h"
 #include "core/html/shadow/MediaControlElements.h"
 #include "core/html/shadow/ShadowElementNames.h"
 #include "core/html/shadow/SpinButtonElement.h"
 #include "core/html/shadow/TextControlInnerElements.h"
 #include "core/page/FocusController.h"
 #include "core/page/Page.h"
@@ skipping 709 matching lines @@
     if (!node || !node->active() || !node->isElementNode()
         || !toElement(node)->isSpinButtonElement())
         return false;
     SpinButtonElement* element = toSpinButtonElement(node);
     return element->upDownState() == SpinButtonElement::Up;
 }
 
 bool RenderTheme::isReadOnlyControl(const RenderObject* o) const
 {
     Node* node = o->node();
-    if (!node || !node->isElementNode())
+    if (!node || !node->isElementNode() || !toElement(node)->isFormControlElement())
         return false;
-    return toElement(node)->matchesReadOnlyPseudoClass();
+    HTMLFormControlElement* element = toHTMLFormControlElement(node);
+    return element->isReadOnly();
 }
 
 bool RenderTheme::isHovered(const RenderObject* o) const
 {
     Node* node = o->node();
     if (!node)
         return false;
     if (!node->isElementNode() || !toElement(node)->isSpinButtonElement())
         return node->hovered();
     SpinButtonElement* element = toSpinButtonElement(node);
@@ skipping 471 matching lines @@
 
     // padding - not honored by WinIE, needs to be removed.
     style->resetPadding();
 
     // border - honored by WinIE, but looks terrible (just paints in the control box and turns off the Windows XP theme)
     // for now, we will not honor it.
     style->resetBorder();
 }
 
 } // namespace WebCore