Put transform tree building in DisplayItemPropertyTreeBuilder.

Source/core/compositing/DisplayListCompositingBuilder.cpp

Index: Source/core/compositing/DisplayListCompositingBuilder.cpp
diff --git a/Source/core/compositing/DisplayListCompositingBuilder.cpp b/Source/core/compositing/DisplayListCompositingBuilder.cpp
index 95a5baef84e315ddf1cd69c919089cd9df10f7f9..d8d3f45a77a456a0d08ba0f20621047579c06412 100644
--- a/Source/core/compositing/DisplayListCompositingBuilder.cpp
+++ b/Source/core/compositing/DisplayListCompositingBuilder.cpp
@@ -5,7 +5,7 @@
 #include "config.h"
 #include "core/compositing/DisplayListCompositingBuilder.h"
 
-#include "platform/graphics/paint/DisplayItemTransformTreeBuilder.h"
+#include "platform/graphics/paint/DisplayItemPropertyTreeBuilder.h"
 
 namespace blink {
 
@@ -14,10 +14,12 @@ void DisplayListCompositingBuilder::build(CompositedDisplayList& compositedDispl
     // TODO(pdr): Properly implement simple layer compositing here.
     // See: https://docs.google.com/document/d/1qF7wpO_lhuxUO6YXKZ3CJuXi0grcb5gKZJBBgnoTd0k/view
 
-    DisplayItemTransformTreeBuilder transformTreeBuilder;
+    DisplayItemPropertyTreeBuilder treeBuilder;
     for (const auto& displayItem : m_displayItemList.displayItems())
-        transformTreeBuilder.processDisplayItem(displayItem);
-    compositedDisplayList.transformTree = transformTreeBuilder.releaseTransformTree();
+        treeBuilder.processDisplayItem(displayItem);
+    compositedDisplayList.transformTree = treeBuilder.releaseTransformTree();
+    // TODO(pdr, jbroman): Also release other trees, and use range records to
+    // construct simple layers.
 }
 
 } // namespace blink