Convert HTMLFrameOwnerElement and FocusController to use Frame.

Source/core/editing/Editor.cpp

Index: Source/core/editing/Editor.cpp
diff --git a/Source/core/editing/Editor.cpp b/Source/core/editing/Editor.cpp
index ba4484d2aac3492583c216773431702b3b8b7d96..c08d976fd6e73036306ca1be4443f185cc9daf3e 100644
--- a/Source/core/editing/Editor.cpp
+++ b/Source/core/editing/Editor.cpp
@@ -807,7 +807,7 @@ bool Editor::insertTextWithoutSendingTextEvent(const String& text, bool selectIn
             // Reveal the current selection
             if (LocalFrame* editedFrame = document->frame()) {
                 if (Page* page = editedFrame->page())
-                    page->focusController().focusedOrMainFrame()->selection().revealSelection(ScrollAlignment::alignCenterIfNeeded);
+                    toLocalFrame(page->focusController().focusedOrMainFrame())->selection().revealSelection(ScrollAlignment::alignCenterIfNeeded);
             }
         }
     }