Make DOMSelection cache Range

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 b1a7dac6852f785659929563034e230bb7cd12b9..5b14563da0d9b6b62432a7d49b5cf971f45281fc 100644
--- a/third_party/WebKit/Source/core/editing/DOMSelection.h
+++ b/third_party/WebKit/Source/core/editing/DOMSelection.h
@@ -101,6 +101,8 @@ class CORE_EXPORT DOMSelection final : public GarbageCollected<DOMSelection>,
   // Microsoft Selection Object API
   void empty();
 
+  void markRangeDirty();
+
   DECLARE_VIRTUAL_TRACE();
 
  private:
@@ -118,7 +120,11 @@ class CORE_EXPORT DOMSelection final : public GarbageCollected<DOMSelection>,
 
   void addConsoleError(const String& message);
 
+  Range* createRangeFromSelectionEditor();
+  void cacheRangeIfAttachedToRootDocument(Range*);
+
   Member<const TreeScope> m_treeScope;
+  Member<Range> m_range;
 };
 
 }  // namespace blink