Put transform tree building in DisplayItemPropertyTreeBuilder.

Source/platform/exported/WebDisplayItemTransformTree.cpp

Index: Source/platform/exported/WebDisplayItemTransformTree.cpp
diff --git a/Source/platform/exported/WebDisplayItemTransformTree.cpp b/Source/platform/exported/WebDisplayItemTransformTree.cpp
index 307438960e5196ca4e1781db42cd31f67f406f2b..9b823db3989adf9e2f0d9cd5f7544903556000d9 100644
--- a/Source/platform/exported/WebDisplayItemTransformTree.cpp
+++ b/Source/platform/exported/WebDisplayItemTransformTree.cpp
@@ -10,7 +10,6 @@
 namespace blink {
 
 WebDisplayItemTransformTree::WebDisplayItemTransformTree()
-    : m_private(adoptPtr(new DisplayItemTransformTree))
 {
 }
 
@@ -35,19 +34,4 @@ const WebDisplayItemTransformTree::TransformNode& WebDisplayItemTransformTree::n
     return m_private->nodeAt(index);
 }
 
-const WebDisplayItemTransformTree::TransformNode& WebDisplayItemTransformTree::parentNode(const WebDisplayItemTransformTree::TransformNode& node) const
-{
-    return m_private->parentNode(node);
-}
-
-size_t WebDisplayItemTransformTree::rangeRecordCount() const
-{
-    return m_private->rangeRecordCount();
-}
-
-const WebDisplayItemTransformTree::RangeRecord& WebDisplayItemTransformTree::rangeRecordAt(size_t index) const
-{
-    return m_private->rangeRecordAt(index);
-}
-
 } // namespace blink