[CodeHealth] Use Position::anchorNode instead of deprecatedNode.

Source/core/page/FocusController.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 670 matching lines @@
         return false;
     LocalFrame* frame = toLocalFrame(focusedOrMainFrame());
     ASSERT(frame);
     Document* document = frame->document();
 
     Node* currentNode = document->focusedElement();
     // FIXME: Not quite correct when it comes to focus transitions leaving/entering the WebView itself
     bool caretBrowsing = frame->settings() && frame->settings()->caretBrowsingEnabled();
 
     if (caretBrowsing && !currentNode)
-        currentNode = frame->selection().start().deprecatedNode();
+        currentNode = frame->selection().start().anchorNode();
 
     document->updateLayoutIgnorePendingStylesheets();
 
     RefPtrWillBeRawPtr<Element> element = findFocusableElementAcrossFocusScopes(type, FocusNavigationScope::focusNavigationScopeOf(currentNode ? *currentNode : *document), currentNode);
 
     if (!element) {
         // We didn't find an element to focus, so we should try to pass focus to Chrome.
         if (!initialFocus && m_page->chromeClient().canTakeFocus(type)) {
             document->setFocusedElement(nullptr);
             setFocusedFrame(nullptr);
@@ skipping 74 matching lines @@
         return;
 
     FrameSelection& selection = oldFocusedFrame->selection();
     if (selection.isNone())
         return;
 
     bool caretBrowsing = oldFocusedFrame->settings()->caretBrowsingEnabled();
     if (caretBrowsing)
         return;
 
-    Node* selectionStartNode = selection.selection().start().deprecatedNode();
+    Node* selectionStartNode = selection.selection().start().anchorNode();
     if (selectionStartNode == newFocusedElement || selectionStartNode->isDescendantOf(newFocusedElement))
         return;
 
     if (!enclosingTextFormControl(selectionStartNode))
         return;
 
     if (selectionStartNode->isInShadowTree() && selectionStartNode->shadowHost() == newFocusedElement)
         return;
 
     selection.clear();
@@ skipping 251 matching lines @@
     return consumed;
 }
 
 DEFINE_TRACE(FocusController)
 {
     visitor->trace(m_page);
     visitor->trace(m_focusedFrame);
 }
 
 } // namespace blink