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

Source/core/editing/SelectionController.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * 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
@@ skipping 208 matching lines @@
     // Don't modify the selection if we're not on a node.
     if (targetPosition.isNull())
         return;
 
     // Restart the selection if this is the first mouse move. This work is usually
     // done in handleMousePressEvent, but not if the mouse press was on an existing selection.
     VisibleSelection newSelection = selection().selection();
 
     // Special case to limit selection to the containing block for SVG text.
     // FIXME: Isn't there a better non-SVG-specific way to do this?
-    if (Node* selectionBaseNode = Strategy::selectionBase(newSelection).deprecatedNode()) {
+    if (Node* selectionBaseNode = Strategy::selectionBase(newSelection).anchorNode()) {
         if (LayoutObject* selectionBaseLayoutObject = selectionBaseNode->layoutObject()) {
             if (selectionBaseLayoutObject->isSVGText()) {
                 if (target->layoutObject()->containingBlock() != selectionBaseLayoutObject->containingBlock())
                     return;
             }
         }
     }
 
     if (m_selectionState == SelectionState::HaveNotStartedSelection && !dispatchSelectStart(target))
         return;
@@ skipping 128 matching lines @@
         return selectClosestWordFromMouseEvent(result);
 
     Node* innerNode = result.innerNode();
 
     if (!innerNode || !innerNode->layoutObject() || !m_mouseDownMayStartSelect)
         return;
 
     VisibleSelection newSelection;
     Element* URLElement = result.hitTestResult().URLElement();
     VisiblePosition pos(innerNode->layoutObject()->positionForPoint(result.localPoint()));
-    if (pos.isNotNull() && pos.deepEquivalent().deprecatedNode()->isDescendantOf(URLElement))
+    if (pos.isNotNull() && pos.deepEquivalent().anchorNode()->isDescendantOf(URLElement))
         newSelection = VisibleSelection::selectionFromContentsOfNode(URLElement);
 
     updateSelectionForMouseDownDispatchingSelectStart(innerNode, expandSelectionToRespectUserSelectAll(innerNode, newSelection), WordGranularity);
 }
 
 bool SelectionController::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event)
 {
     TRACE_EVENT0("blink", "SelectionController::handleMousePressEventDoubleClick");
 
     if (event.event().button() != LeftButton)
@@ skipping 238 matching lines @@
     else
         m_selectionState = SelectionState::HaveNotStartedSelection;
 }
 
 FrameSelection& SelectionController::selection() const
 {
     return m_frame->selection();
 }
 
 } // namespace blink