Complete XXXPaintPropertyNode::operator== and toString()

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 5ddf71865c37033b782f996e4179295f798580ae..fe547f157d58fbd9c8172cff64d747b282c1b963 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/TransformPaintPropertyNode.cpp
+++ b/third_party/WebKit/Source/platform/graphics/paint/TransformPaintPropertyNode.cpp
@@ -14,7 +14,13 @@ TransformPaintPropertyNode* TransformPaintPropertyNode::root() {
 }
 
 String TransformPaintPropertyNode::toString() const {
-  return "transform=" + m_matrix.toString() + " origin=" + m_origin.toString();
+  return String::format(
+      "parent=%p transform=%s origin=%s flattensInheritedTransform=%s "
+      "renderContextID=%x directCompositingReasons=%s",
+      m_parent.get(), m_matrix.toString().ascii().data(),
+      m_origin.toString().ascii().data(),
+      m_flattensInheritedTransform ? "yes" : "no", m_renderingContextID,
+      compositingReasonsAsString(m_directCompositingReasons).ascii().data());
 }
 
 }  // namespace blink