Expand FrameSeleciton::extent() to increase chances of hoisting update layout

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

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 Apple 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
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 959 matching lines @@
 
   LayoutRect rect;
 
   switch (computeVisibleSelectionInDOMTree().getSelectionType()) {
     case NoSelection:
       return;
     case CaretSelection:
       rect = LayoutRect(absoluteCaretBounds());
       break;
     case RangeSelection:
-      rect = LayoutRect(
-          revealExtentOption == RevealExtent
-              ? absoluteCaretBoundsOf(createVisiblePosition(extent()))
-              : enclosingIntRect(unclippedBounds()));
+      rect = LayoutRect(revealExtentOption == RevealExtent
+                            ? absoluteCaretBoundsOf(createVisiblePosition(
+                                  computeVisibleSelectionInDOMTree().extent()))
+                            : enclosingIntRect(unclippedBounds()));
       break;
   }
 
   Position start = computeVisibleSelectionInDOMTreeDeprecated().start();
   DCHECK(start.anchorNode());
   if (start.anchorNode() && start.anchorNode()->layoutObject()) {
     // FIXME: This code only handles scrolling the startContainer's layer, but
     // the selection rect could intersect more than just that.
     if (DocumentLoader* documentLoader = m_frame->loader().documentLoader())
       documentLoader->initialScrollState().wasScrolledByUser = true;
@@ skipping 182 matching lines @@
 }
 
 void showTree(const blink::FrameSelection* sel) {
   if (sel)
     sel->showTreeForThis();
   else
     LOG(INFO) << "Cannot showTree for <null> FrameSelection.";
 }
 
 #endif