Move property tree debugging code to platform/graphics/paint/ (try #2)

third_party/WebKit/Source/platform/graphics/paint/TransformPaintPropertyNode.cpp

Index: third_party/WebKit/Source/platform/graphics/paint/TransformPaintPropertyNode.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/paint/TransformPaintPropertyNode.cpp b/third_party/WebKit/Source/platform/graphics/paint/TransformPaintPropertyNode.cpp
index 70cbe4c0154b5391e9ff77032e88dcbb18bf8927..69abe7eabdc3739965165e027b918f4223fe5efa 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/TransformPaintPropertyNode.cpp
+++ b/third_party/WebKit/Source/platform/graphics/paint/TransformPaintPropertyNode.cpp
@@ -4,6 +4,8 @@
 
 #include "platform/graphics/paint/TransformPaintPropertyNode.h"
 
+#include "platform/graphics/paint/PropertyTreeState.h"
+
 namespace blink {
 
 TransformPaintPropertyNode* TransformPaintPropertyNode::root() {
@@ -26,4 +28,13 @@ String TransformPaintPropertyNode::toString() const {
       m_compositorElementId.primaryId, m_compositorElementId.secondaryId);
 }
 
+#if DCHECK_IS_ON()
+
+String TransformPaintPropertyNode::toTreeString() const {
+  return blink::PropertyTreeStatePrinter<blink::TransformPaintPropertyNode>()
+      .pathAsString(this);
+}
+
+#endif
+
 }  // namespace blink