Add support for 'order' on grid items

Source/core/rendering/OrderIterator.cpp

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/rendering/OrderIterator.h"
 
 #include "core/rendering/RenderFlexibleBox.h"
+#include "core/rendering/RenderGrid.h"
 
 namespace WebCore {
 
 OrderIterator::OrderIterator(const RenderFlexibleBox* flexibleBox)
-    : m_flexibleBox(flexibleBox)
+    : m_containerBox(flexibleBox)
     , m_currentChild(0)
     , m_orderValuesIterator(0)
 {
+}
+
+OrderIterator::OrderIterator(const RenderGrid* gridContainerBox)
+    : m_containerBox(gridContainerBox)
+    , m_currentChild(0)
+    , m_orderValuesIterator(0)
+{
 }
 
 void OrderIterator::setOrderValues(Vector<int>& orderValues)
 {
     reset();
     m_orderValues.clear();
 
     if (orderValues.isEmpty())
         return;
 
@@ skipping 31 matching lines @@
             if (m_orderValuesIterator == m_orderValues.end())
                 return 0;
             if (m_orderValuesIterator) {
                 ++m_orderValuesIterator;
                 if (m_orderValuesIterator == m_orderValues.end())
                     return 0;
             } else {
                 m_orderValuesIterator = m_orderValues.begin();
             }
 
-            m_currentChild = m_flexibleBox->firstChildBox();
+            m_currentChild = m_containerBox->firstChildBox();
         } else {
             m_currentChild = m_currentChild->nextSiblingBox();
         }
     } while (!m_currentChild || m_currentChild->style()->order() != *m_orderValuesIterator);
 
     return m_currentChild;
 }
 
 void OrderIterator::reset()
 {
     m_currentChild = 0;
     m_orderValuesIterator = 0;
 }
 
 } // namespace WebCore