Select All present even all selectable text has been selected

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

Index: third_party/WebKit/Source/core/editing/FrameSelection.h
diff --git a/third_party/WebKit/Source/core/editing/FrameSelection.h b/third_party/WebKit/Source/core/editing/FrameSelection.h
index d78e98af7b559247bc54b9a056385d56c6c036f9..cea1b69faa8eff07ed0acaa588ea09a06f1d7e5a 100644
--- a/third_party/WebKit/Source/core/editing/FrameSelection.h
+++ b/third_party/WebKit/Source/core/editing/FrameSelection.h
@@ -145,6 +145,7 @@ class CORE_EXPORT FrameSelection final
       SelectionDirectionalMode = SelectionDirectionalMode::NonDirectional,
       FrameSelection::SetSelectionOptions = CloseTyping | ClearTypingStyle);
   void selectAll();
+  bool canSelectAll();
   void clear();
 
   // TODO(tkent): These two functions were added to fix crbug.com/695211 without
@@ -312,6 +313,8 @@ class CORE_EXPORT FrameSelection final
 
   GranularityStrategy* granularityStrategy();
 
+  Node* selectAllRoot();
+
   // Implementation of |SynchronousMutationObserver| member functions.
   void contextDestroyed(Document*) final;
   void nodeChildrenWillBeRemoved(ContainerNode&) final;