Do-not-commit: Count layout tree memory usage

third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceClipper.h

Index: third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceClipper.h
diff --git a/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceClipper.h b/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceClipper.h
index b84f52a7007bd3a65d86a98483fd17668f22d95d..f25de3be603326664ec81c24aa7371cdab219089 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceClipper.h
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceClipper.h
@@ -65,6 +65,14 @@ class LayoutSVGResourceClipper final : public LayoutSVGResourceContainer {
   }
 
  private:
+  char objectSize() const override { return sizeof(this); }
+  char approximateHeapMemoryUsage() const override {
+    int memory = LayoutSVGResourceContainer::approximateHeapMemoryUsage();
+    // TODO(pdr): Include memory from m_clipContentPath.
+    // TODO(pdr): Include memory from m_cachedPaintRecord.
+    return memory;
+  }
+
   void calculateLocalClipBounds();
 
   // Return true if the clip path was calculated or a cached value is available.