Do-not-commit: Count layout tree memory usage

third_party/WebKit/Source/core/paint/ObjectPaintProperties.h

Index: third_party/WebKit/Source/core/paint/ObjectPaintProperties.h
diff --git a/third_party/WebKit/Source/core/paint/ObjectPaintProperties.h b/third_party/WebKit/Source/core/paint/ObjectPaintProperties.h
index 67163e99b885b7abb34044b78beb83984e648527..8f2773e1aaca27902640378f6180de37d7052e2d 100644
--- a/third_party/WebKit/Source/core/paint/ObjectPaintProperties.h
+++ b/third_party/WebKit/Source/core/paint/ObjectPaintProperties.h
@@ -51,6 +51,47 @@ class CORE_EXPORT ObjectPaintProperties {
     return WTF::wrapUnique(new ObjectPaintProperties());
   }
 
+  char heapMemoryUsage() const {
+    char memory = 0;
+    if (m_paintOffsetTranslation)
+      memory += sizeof(TransformPaintPropertyNode);
+    if (m_transform)
+      memory += sizeof(TransformPaintPropertyNode);
+    if (m_effect)
+      memory += sizeof(EffectPaintPropertyNode);
+    if (m_filter)
+      memory += sizeof(EffectPaintPropertyNode);
+    if (m_mask)
+      memory += sizeof(EffectPaintPropertyNode);
+    if (m_maskClip)
+      memory += sizeof(ClipPaintPropertyNode);
+    if (m_cssClip)
+      memory += sizeof(ClipPaintPropertyNode);
+    if (m_cssClipFixedPosition)
+      memory += sizeof(ClipPaintPropertyNode);
+    if (m_innerBorderRadiusClip)
+      memory += sizeof(ClipPaintPropertyNode);
+    if (m_overflowClip)
+      memory += sizeof(ClipPaintPropertyNode);
+    if (m_perspective)
+      memory += sizeof(TransformPaintPropertyNode);
+    if (m_svgLocalToBorderBoxTransform)
+      memory += sizeof(TransformPaintPropertyNode);
+    if (m_scrollTranslation) {
+      memory += sizeof(TransformPaintPropertyNode);
+      memory += sizeof(ScrollPaintPropertyNode);
+    }
+    if (m_scrollbarPaintOffset)
+      memory += sizeof(TransformPaintPropertyNode);
+    if (m_localBorderBoxProperties)
+      memory += sizeof(PropertyTreeState);
+    if (m_contentsProperties)
+      memory += sizeof(PropertyTreeState);
+    return memory;
+  }
+
+  bool hasContentsProperties() const { return !!m_contentsProperties; }
+
   // The hierarchy of the transform subtree created by a LayoutObject is as
   // follows:
   // [ paintOffsetTranslation ]           Normally paint offset is accumulated