diff -r 000000000000 -r 6474c204b198 content/base/src/nsNodeInfo.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/base/src/nsNodeInfo.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,212 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Class that represents a prefix/namespace/localName triple; a single
+ * nodeinfo is shared by all elements in a document that have that
+ * prefix, namespace, and localName.
+ */
+
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Likely.h"
+
+#include "nscore.h"
+#include "nsNodeInfo.h"
+#include "nsNodeInfoManager.h"
+#include "nsCOMPtr.h"
+#include "nsString.h"
+#include "nsIAtom.h"
+#include "nsDOMString.h"
+#include "nsCRT.h"
+#include "nsContentUtils.h"
+#include "nsReadableUtils.h"
+#include "nsAutoPtr.h"
+#include "prprf.h"
+#include "nsIDocument.h"
+#include "nsGkAtoms.h"
+#include "nsCCUncollectableMarker.h"
+
+using namespace mozilla;
+
+nsNodeInfo::~nsNodeInfo()
+{
+  mOwnerManager->RemoveNodeInfo(this);
+
+  NS_RELEASE(mInner.mName);
+  NS_IF_RELEASE(mInner.mPrefix);
+  NS_IF_RELEASE(mInner.mExtraName);
+}
+
+
+nsNodeInfo::nsNodeInfo(nsIAtom *aName, nsIAtom *aPrefix, int32_t aNamespaceID,
+                       uint16_t aNodeType, nsIAtom* aExtraName,
+                       nsNodeInfoManager *aOwnerManager)
+{
+  CheckValidNodeInfo(aNodeType, aName, aNamespaceID, aExtraName);
+  NS_ABORT_IF_FALSE(aOwnerManager, "Invalid aOwnerManager");
+
+  // Initialize mInner
+  NS_ADDREF(mInner.mName = aName);
+  NS_IF_ADDREF(mInner.mPrefix = aPrefix);
+  mInner.mNamespaceID = aNamespaceID;
+  mInner.mNodeType = aNodeType;
+  mOwnerManager = aOwnerManager;
+  NS_IF_ADDREF(mInner.mExtraName = aExtraName);
+
+  mDocument = aOwnerManager->GetDocument();
+
+  // Now compute our cached members.
+
+  // Qualified name.  If we have no prefix, use ToString on
+  // mInner.mName so that we get to share its buffer.
+  if (aPrefix) {
+    mQualifiedName = nsDependentAtomString(mInner.mPrefix) +
+                     NS_LITERAL_STRING(":") +
+                     nsDependentAtomString(mInner.mName);
+  } else {
+    mInner.mName->ToString(mQualifiedName);
+  }
+
+  MOZ_ASSERT_IF(aNodeType != nsIDOMNode::ELEMENT_NODE &&
+                aNodeType != nsIDOMNode::ATTRIBUTE_NODE &&
+                aNodeType != UINT16_MAX,
+                aNamespaceID == kNameSpaceID_None && !aPrefix);
+
+  switch (aNodeType) {
+    case nsIDOMNode::ELEMENT_NODE:
+    case nsIDOMNode::ATTRIBUTE_NODE:
+      // Correct the case for HTML
+      if (aNodeType == nsIDOMNode::ELEMENT_NODE &&
+          aNamespaceID == kNameSpaceID_XHTML && GetDocument() &&
+          GetDocument()->IsHTML()) {
+        nsContentUtils::ASCIIToUpper(mQualifiedName, mNodeName);
+      } else {
+        mNodeName = mQualifiedName;
+      }
+      mInner.mName->ToString(mLocalName);
+      break;
+    case nsIDOMNode::TEXT_NODE:
+    case nsIDOMNode::CDATA_SECTION_NODE:
+    case nsIDOMNode::COMMENT_NODE:
+    case nsIDOMNode::DOCUMENT_NODE:
+    case nsIDOMNode::DOCUMENT_FRAGMENT_NODE:
+      mInner.mName->ToString(mNodeName);
+      SetDOMStringToNull(mLocalName);
+      break;
+    case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:
+    case nsIDOMNode::DOCUMENT_TYPE_NODE:
+      mInner.mExtraName->ToString(mNodeName);
+      SetDOMStringToNull(mLocalName);
+      break;
+    default:
+      NS_ABORT_IF_FALSE(aNodeType == UINT16_MAX,
+                        "Unknown node type");
+  }
+}
+
+
+// nsISupports
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(nsNodeInfo)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_0(nsNodeInfo)
+
+static const char* kNSURIs[] = {
+  " ([none])",
+  " (xmlns)",
+  " (xml)",
+  " (xhtml)",
+  " (XLink)",
+  " (XSLT)",
+  " (XBL)",
+  " (MathML)",
+  " (RDF)",
+  " (XUL)"
+};
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(nsNodeInfo)
+  if (MOZ_UNLIKELY(cb.WantDebugInfo())) {
+    char name[72];
+    uint32_t nsid = tmp->NamespaceID();
+    nsAtomCString localName(tmp->NameAtom());
+    if (nsid < ArrayLength(kNSURIs)) {
+      PR_snprintf(name, sizeof(name), "nsNodeInfo%s %s", kNSURIs[nsid],
+                  localName.get());
+    }
+    else {
+      PR_snprintf(name, sizeof(name), "nsNodeInfo %s", localName.get());
+    }
+
+    cb.DescribeRefCountedNode(tmp->mRefCnt.get(), name);
+  }
+  else {
+    NS_IMPL_CYCLE_COLLECTION_DESCRIBE(nsNodeInfo, tmp->mRefCnt.get())
+  }
+
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOwnerManager)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsNodeInfo)
+  return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
+
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsNodeInfo)
+  return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
+
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsNodeInfo)
+  return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();
+NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
+
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsNodeInfo)
+NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_DESTROY(nsNodeInfo, LastRelease())
+NS_INTERFACE_TABLE_HEAD(nsNodeInfo)
+  NS_INTERFACE_TABLE(nsNodeInfo, nsINodeInfo)
+  NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(nsNodeInfo)
+NS_INTERFACE_MAP_END
+
+// nsINodeInfo
+
+void
+nsNodeInfo::GetNamespaceURI(nsAString& aNameSpaceURI) const
+{
+  if (mInner.mNamespaceID > 0) {
+    nsresult rv =
+      nsContentUtils::NameSpaceManager()->GetNameSpaceURI(mInner.mNamespaceID,
+                                                          aNameSpaceURI);
+    // How can we possibly end up with a bogus namespace ID here?
+    if (NS_FAILED(rv)) {
+      MOZ_CRASH();
+    }
+  } else {
+    SetDOMStringToNull(aNameSpaceURI);
+  }
+}
+
+
+bool
+nsNodeInfo::NamespaceEquals(const nsAString& aNamespaceURI) const
+{
+  int32_t nsid =
+    nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNamespaceURI);
+
+  return nsINodeInfo::NamespaceEquals(nsid);
+}
+
+void
+nsNodeInfo::LastRelease()
+{
+  nsRefPtr<nsNodeInfoManager> kungFuDeathGrip = mOwnerManager;
+  delete this;
+}
+
+bool
+nsNodeInfo::CanSkip()
+{
+  return mDocument &&
+    nsCCUncollectableMarker::InGeneration(mDocument->GetMarkedCCGeneration());
+}