Dispose temporary and not-cached Range in DOMSelection

third_party/WebKit/Source/core/editing/DOMSelection.h

Index: third_party/WebKit/Source/core/editing/DOMSelection.h
diff --git a/third_party/WebKit/Source/core/editing/DOMSelection.h b/third_party/WebKit/Source/core/editing/DOMSelection.h
index 150408b91fb4de31b6737a39e32c154fda96dd8f..b36dfbb8a36f2fb5a2de522217295f5de0885801 100644
--- a/third_party/WebKit/Source/core/editing/DOMSelection.h
+++ b/third_party/WebKit/Source/core/editing/DOMSelection.h
@@ -89,6 +89,11 @@ class CORE_EXPORT DOMSelection final : public GarbageCollected<DOMSelection>,
   void collapseToEnd(ExceptionState&);
   void collapseToStart(ExceptionState&);
   void extend(Node*, unsigned offset, ExceptionState&);
+  // Selection.getRangeAt of document returns reference as spec:
+  // http://w3c.github.io/selection-api/#dom-selection-getrangeat
+  // However, Selection of shadow root returns copied Range everytime so far
+  // because no spec for this:
+  // https://w3c.github.io/webcomponents/spec/shadow/#ranges-and-selections
   Range* getRangeAt(unsigned, ExceptionState&) const;
   void removeRange(Range*);
   void removeAllRanges();