Sync Document.createProcessingInstruction() with spec

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 769 matching lines @@
 {
     return Comment::create(*this, data);
 }
 
 PassRefPtr<CDATASection> Document::createCDATASection(const String& data, ExceptionState& exceptionState)
 {
     if (isHTMLDocument()) {
         exceptionState.throwUninformativeAndGenericDOMException(NotSupportedError);
         return 0;
     }
-    if (data.find("]]>") != WTF::kNotFound) {
+    if (data.contains("]]>")) {
         exceptionState.throwDOMException(InvalidCharacterError, "String cannot contain ']]>' since that is the end delimiter of a CData section.");
         return 0;
     }
     return CDATASection::create(*this, data);
 }
 
 PassRefPtr<ProcessingInstruction> Document::createProcessingInstruction(const String& target, const String& data, ExceptionState& exceptionState)
 {
     if (!isValidName(target)) {
-        exceptionState.throwUninformativeAndGenericDOMException(InvalidCharacterError);
+        exceptionState.throwDOMException(InvalidCharacterError, "The target provided ('" + target + "') is not a valid name.");
         return 0;
     }
-    if (isHTMLDocument()) {
-        exceptionState.throwUninformativeAndGenericDOMException(NotSupportedError);
+    if (data.contains("?>")) {
+        exceptionState.throwDOMException(InvalidCharacterError, "The data provided ('" + data + "') contains '?>'.");
         return 0;
     }
     return ProcessingInstruction::create(*this, target, data);
 }
 
 PassRefPtr<Text> Document::createEditingTextNode(const String& text)
 {
     return Text::createEditingText(*this, text);
 }
 
@@ skipping 4416 matching lines @@
 }
 
 FastTextAutosizer* Document::fastTextAutosizer()
 {
     if (!m_fastTextAutosizer && RuntimeEnabledFeatures::fastTextAutosizingEnabled())
         m_fastTextAutosizer = FastTextAutosizer::create(this);
     return m_fastTextAutosizer.get();
 }
 
 } // namespace WebCore