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diff --git a/Source/WebCore/dom/ProcessingInstruction.cpp b/Source/WebCore/dom/ProcessingInstruction.cpp
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+++ b/Source/WebCore/dom/ProcessingInstruction.cpp
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+/*
+ * Copyright (C) 2000 Peter Kelly (pmk@post.com)
+ * Copyright (C) 2006, 2008, 2009 Apple Inc. All rights reserved.
+ *
+ * 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
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "config.h"
+#include "ProcessingInstruction.h"
+
+#include "CSSStyleSheet.h"
+#include "CachedCSSStyleSheet.h"
+#include "CachedXSLStyleSheet.h"
+#include "Document.h"
+#include "CachedResourceLoader.h"
+#include "ExceptionCode.h"
+#include "Frame.h"
+#include "FrameLoader.h"
+#include "XSLStyleSheet.h"
+#include "XMLDocumentParser.h" // for parseAttributes()
+#include "MediaList.h"
+
+namespace WebCore {
+
+inline ProcessingInstruction::ProcessingInstruction(Document* document, const String& target, const String& data)
+    : ContainerNode(document)
+    , m_target(target)
+    , m_data(data)
+    , m_cachedSheet(0)
+    , m_loading(false)
+    , m_alternate(false)
+    , m_createdByParser(false)
+#if ENABLE(XSLT)
+    , m_isXSL(false)
+#endif
+{
+}
+
+PassRefPtr<ProcessingInstruction> ProcessingInstruction::create(Document* document, const String& target, const String& data)
+{
+    return adoptRef(new ProcessingInstruction(document, target, data));
+}
+
+ProcessingInstruction::~ProcessingInstruction()
+{
+    if (m_sheet)
+        m_sheet->clearOwnerNode();
+
+    if (m_cachedSheet)
+        m_cachedSheet->removeClient(this);
+}
+
+void ProcessingInstruction::setData(const String& data, ExceptionCode&)
+{
+    int oldLength = m_data.length();
+    m_data = data;
+    document()->textRemoved(this, 0, oldLength);
+    checkStyleSheet();
+}
+
+String ProcessingInstruction::nodeName() const
+{
+    return m_target;
+}
+
+Node::NodeType ProcessingInstruction::nodeType() const
+{
+    return PROCESSING_INSTRUCTION_NODE;
+}
+
+String ProcessingInstruction::nodeValue() const
+{
+    return m_data;
+}
+
+void ProcessingInstruction::setNodeValue(const String& nodeValue, ExceptionCode& ec)
+{
+    // NO_MODIFICATION_ALLOWED_ERR: taken care of by setData()
+    setData(nodeValue, ec);
+}
+
+PassRefPtr<Node> ProcessingInstruction::cloneNode(bool /*deep*/)
+{
+    // FIXME: Is it a problem that this does not copy m_localHref?
+    // What about other data members?
+    return create(document(), m_target, m_data);
+}
+
+// DOM Section 1.1.1
+bool ProcessingInstruction::childTypeAllowed(NodeType)
+{
+    return false;
+}
+
+void ProcessingInstruction::checkStyleSheet()
+{
+    if (m_target == "xml-stylesheet" && document()->frame() && parentNode() == document()) {
+        // see http://www.w3.org/TR/xml-stylesheet/
+        // ### support stylesheet included in a fragment of this (or another) document
+        // ### make sure this gets called when adding from javascript
+        bool attrsOk;
+        const HashMap<String, String> attrs = parseAttributes(m_data, attrsOk);
+        if (!attrsOk)
+            return;
+        HashMap<String, String>::const_iterator i = attrs.find("type");
+        String type;
+        if (i != attrs.end())
+            type = i->second;
+
+        bool isCSS = type.isEmpty() || type == "text/css";
+#if ENABLE(XSLT)
+        m_isXSL = (type == "text/xml" || type == "text/xsl" || type == "application/xml" ||
+                   type == "application/xhtml+xml" || type == "application/rss+xml" || type == "application/atom+xml");
+        if (!isCSS && !m_isXSL)
+#else
+        if (!isCSS)
+#endif
+            return;
+
+        String href = attrs.get("href");
+        String alternate = attrs.get("alternate");
+        m_alternate = alternate == "yes";
+        m_title = attrs.get("title");
+        m_media = attrs.get("media");
+
+        if (href.length() > 1 && href[0] == '#') {
+            m_localHref = href.substring(1);
+#if ENABLE(XSLT)
+            // We need to make a synthetic XSLStyleSheet that is embedded.  It needs to be able
+            // to kick off import/include loads that can hang off some parent sheet.
+            if (m_isXSL) {
+                KURL finalURL(ParsedURLString, m_localHref);
+                m_sheet = XSLStyleSheet::createEmbedded(this, finalURL);
+                m_loading = false;
+            }
+#endif
+        } else {
+            if (m_cachedSheet) {
+                m_cachedSheet->removeClient(this);
+                m_cachedSheet = 0;
+            }
+            
+            String url = document()->completeURL(href).string();
+            if (!dispatchBeforeLoadEvent(url))
+                return;
+            
+            m_loading = true;
+            document()->addPendingSheet();
+            
+#if ENABLE(XSLT)
+            if (m_isXSL)
+                m_cachedSheet = document()->cachedResourceLoader()->requestXSLStyleSheet(url);
+            else
+#endif
+            {
+                String charset = attrs.get("charset");
+                if (charset.isEmpty())
+                    charset = document()->frame()->loader()->writer()->encoding();
+
+                m_cachedSheet = document()->cachedResourceLoader()->requestCSSStyleSheet(url, charset);
+            }
+            if (m_cachedSheet)
+                m_cachedSheet->addClient(this);
+            else {
+                // The request may have been denied if (for example) the stylesheet is local and the document is remote.
+                m_loading = false;
+                document()->removePendingSheet();
+            }
+        }
+    }
+}
+
+bool ProcessingInstruction::isLoading() const
+{
+    if (m_loading)
+        return true;
+    if (!m_sheet)
+        return false;
+    return m_sheet->isLoading();
+}
+
+bool ProcessingInstruction::sheetLoaded()
+{
+    if (!isLoading()) {
+        document()->removePendingSheet();
+        return true;
+    }
+    return false;
+}
+
+void ProcessingInstruction::setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CachedCSSStyleSheet* sheet)
+{
+    if (!inDocument()) {
+        ASSERT(!m_sheet);
+        return;
+    }
+
+#if ENABLE(XSLT)
+    ASSERT(!m_isXSL);
+#endif
+    RefPtr<CSSStyleSheet> newSheet = CSSStyleSheet::create(this, href, baseURL, charset);
+    m_sheet = newSheet;
+    // We don't need the cross-origin security check here because we are
+    // getting the sheet text in "strict" mode. This enforces a valid CSS MIME
+    // type.
+    parseStyleSheet(sheet->sheetText(true));
+    newSheet->setTitle(m_title);
+    newSheet->setMedia(MediaList::create(newSheet.get(), m_media));
+    newSheet->setDisabled(m_alternate);
+}
+
+#if ENABLE(XSLT)
+void ProcessingInstruction::setXSLStyleSheet(const String& href, const KURL& baseURL, const String& sheet)
+{
+    ASSERT(m_isXSL);
+    m_sheet = XSLStyleSheet::create(this, href, baseURL);
+    parseStyleSheet(sheet);
+}
+#endif
+
+void ProcessingInstruction::parseStyleSheet(const String& sheet)
+{
+    m_sheet->parseString(sheet, true);
+    if (m_cachedSheet)
+        m_cachedSheet->removeClient(this);
+    m_cachedSheet = 0;
+
+    m_loading = false;
+    m_sheet->checkLoaded();
+}
+
+void ProcessingInstruction::setCSSStyleSheet(PassRefPtr<CSSStyleSheet> sheet)
+{
+    ASSERT(!m_cachedSheet);
+    ASSERT(!m_loading);
+    m_sheet = sheet;
+    m_sheet->setTitle(m_title);
+    m_sheet->setDisabled(m_alternate);
+}
+
+bool ProcessingInstruction::offsetInCharacters() const
+{
+    return true;
+}
+
+int ProcessingInstruction::maxCharacterOffset() const 
+{
+    return static_cast<int>(m_data.length());
+}
+
+void ProcessingInstruction::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
+{
+    if (!sheet())
+        return;
+    
+    addSubresourceURL(urls, sheet()->baseURL());
+}
+
+void ProcessingInstruction::insertedIntoDocument()
+{
+    ContainerNode::insertedIntoDocument();
+    document()->addStyleSheetCandidateNode(this, m_createdByParser);
+    checkStyleSheet();
+}
+
+void ProcessingInstruction::removedFromDocument()
+{
+    ContainerNode::removedFromDocument();
+
+    document()->removeStyleSheetCandidateNode(this);
+
+    if (m_sheet) {
+        ASSERT(m_sheet->ownerNode() == this);
+        m_sheet->clearOwnerNode();
+        m_sheet = 0;
+    }
+
+    if (m_cachedSheet)
+        document()->styleSelectorChanged(DeferRecalcStyle);
+}
+
+void ProcessingInstruction::finishParsingChildren()
+{
+    m_createdByParser = false;
+    ContainerNode::finishParsingChildren();
+}
+
+#ifdef ANDROID_INSTRUMENT
+void* ProcessingInstruction::operator new(size_t size)
+{
+    return Node::operator new(size);
+}
+
+void* ProcessingInstruction::operator new[](size_t size)
+{
+    return Node::operator new[](size);
+}
+
+void ProcessingInstruction::operator delete(void* p, size_t size)
+{
+    Node::operator delete(p, size);
+}
+
+void ProcessingInstruction::operator delete[](void* p, size_t size)
+{
+    Node::operator delete[](p, size);
+}
+#endif
+
+} // namespace