Clean compositing inputs for location APIs for sticky-affected elements.

third_party/WebKit/Source/core/style/ComputedStyle.h

Index: third_party/WebKit/Source/core/style/ComputedStyle.h
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.h b/third_party/WebKit/Source/core/style/ComputedStyle.h
index 77a3e506ed808ccb2e383dff2070fb6667c8ba65..05ecf9dce450805ef381d7c7de6981980d55cb82 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.h
@@ -1535,6 +1535,14 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase,
     SET_VAR(rare_non_inherited_data_, page_size_type_, t);
   }
 
+  // sticky subtrees
+  bool SubtreeIsSticky() const {
+    return rare_inherited_data_->subtree_is_sticky_;
+  }
+  void SetSubtreeIsSticky(bool b) {
+    SET_VAR(rare_inherited_data_, subtree_is_sticky_, b);
+  }
+
   // Text decoration properties.
   // text-decoration-line
   static TextDecoration InitialTextDecoration() { return kTextDecorationNone; }