Change private API names and return type in FocusController

Source/core/page/FocusController.h

Index: Source/core/page/FocusController.h
diff --git a/Source/core/page/FocusController.h b/Source/core/page/FocusController.h
index 98ad6518522b7966719c13326e76a7b5ebd44559..917ac9642a7da3481afa835378f63f0f14a8b95a 100644
--- a/Source/core/page/FocusController.h
+++ b/Source/core/page/FocusController.h
@@ -77,15 +77,15 @@ private:
     bool advanceFocusDirectionally(WebFocusType);
     bool advanceFocusInDocumentOrder(WebFocusType, bool initialFocus);
 
-    Node* findFocusableNodeAcrossFocusScopes(WebFocusType, const FocusNavigationScope&, Node*);
-    Node* findFocusableNodeAcrossFocusScopesForward(const FocusNavigationScope&, Node*);
-    Node* findFocusableNodeAcrossFocusScopesBackward(const FocusNavigationScope&, Node*);
+    Element* findFocusableElementAcrossFocusScopes(WebFocusType, const FocusNavigationScope&, Node*);
+    Element* findFocusableElementAcrossFocusScopesForward(const FocusNavigationScope&, Node*);
+    Element* findFocusableElementAcrossFocusScopesBackward(const FocusNavigationScope&, Node*);
 
     Element* findFocusableElementRecursively(WebFocusType, const FocusNavigationScope&, Node*);
     Element* findFocusableElementRecursivelyForward(const FocusNavigationScope&, Node*);
     Element* findFocusableElementRecursivelyBackward(const FocusNavigationScope&, Node*);
 
-    Node* findFocusableNodeDecendingDownIntoFrameDocument(WebFocusType, Node*);
+    Element* findFocusableElementDescendingDownIntoFrameDocument(WebFocusType, Element*);
 
     // Searches through the given tree scope, starting from start node, for the next/previous
     // selectable element that comes after/before start node.