Do-not-commit: Count layout tree memory usage

third_party/WebKit/Source/core/layout/LayoutInline.h

Index: third_party/WebKit/Source/core/layout/LayoutInline.h
diff --git a/third_party/WebKit/Source/core/layout/LayoutInline.h b/third_party/WebKit/Source/core/layout/LayoutInline.h
index 7b0fce13be46a191edc8f18c573f3b1e6237ba2b..eb8e4475dc46041da71a009e6fbcd9de1855dc74 100644
--- a/third_party/WebKit/Source/core/layout/LayoutInline.h
+++ b/third_party/WebKit/Source/core/layout/LayoutInline.h
@@ -239,6 +239,12 @@ class CORE_EXPORT LayoutInline : public LayoutBoxModelObject {
   LayoutObjectChildList* children() { return &m_children; }
 
   bool isLayoutInline() const final { return true; }
+  char objectSize() const override { return sizeof(this); }
+  char approximateHeapMemoryUsage() const override {
+    int memory = LayoutBoxModelObject::approximateHeapMemoryUsage();
+    // TODO(pdr): Include the line box list (m_lineBoxes) memory.
+    return memory;
+  }
 
   LayoutRect culledInlineVisualOverflowBoundingBox() const;
   InlineBox* culledInlineFirstLineBox() const;