Add the <t> element and ignore whitespace outside it.

sky/engine/core/html/parser/HTMLElementStack.cpp

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 28 matching lines @@
     ASSERT(m_node);
 }
 
 HTMLElementStack::ElementRecord::~ElementRecord()
 {
 }
 
 HTMLElementStack::HTMLElementStack()
     : m_rootNode(nullptr)
     , m_stackDepth(0)
+    , m_preserveWhiteSpaceCount(0)
 {
 }
 
 HTMLElementStack::~HTMLElementStack()
 {
 }
 
 void HTMLElementStack::popAll()
 {
     m_rootNode = nullptr;
     m_stackDepth = 0;
+    m_preserveWhiteSpaceCount = 0;
     while (m_top)
         m_top = m_top->releaseNext();
 }
 
 void HTMLElementStack::pop()
 {
     popCommon();
 }
 
 void HTMLElementStack::popUntil(Element* element)
@@ skipping 25 matching lines @@
 HTMLElementStack::ElementRecord* HTMLElementStack::topRecord() const
 {
     ASSERT(m_top);
     return m_top.get();
 }
 
 void HTMLElementStack::pushCommon(PassRefPtr<ContainerNode> node)
 {
     ASSERT(m_rootNode);
 
+    if (isHTMLTElement(node))
+        ++m_preserveWhiteSpaceCount;
     m_stackDepth++;
     m_top = adoptPtr(new ElementRecord(node, m_top.release()));
 }
 
 void HTMLElementStack::popCommon()
 {
+    if (isHTMLTElement(topNode())) {
+        ASSERT(m_preserveWhiteSpaceCount);
+        --m_preserveWhiteSpaceCount;
+    }
     m_top = m_top->releaseNext();
     m_stackDepth--;
 }
 
 #ifndef NDEBUG
 
 void HTMLElementStack::show()
 {
     for (ElementRecord* record = m_top.get(); record; record = record->next())
         record->element()->showNode();
 }
 
 #endif
 
 }