Use the font height as caret height instead of the line height

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/editing/GranularityStrategy.h"
 
 #include "core/editing/EditingUtilities.h"
 #include "core/editing/FrameSelection.h"
 
 namespace blink {
 
 enum class BoundAdjust { CurrentPosIfOnBound, NextBoundIfOnBound };
 enum class SearchDirection { SearchBackwards, SearchForward };
 
-// We use the bottom-left corner of the caret rect to represent the
+// We use the bottom-left corner of the selection rect to represent the
 // location of a VisiblePosition. This way locations corresponding to
 // VisiblePositions on the same line will all have the same y coordinate
 // unless the text is transformed.
 static IntPoint positionLocation(const VisiblePosition& vp) {
-  return absoluteCaretBoundsOf(vp).minXMaxYCorner();
+  return absoluteSelectionBoundsOf(vp).minXMaxYCorner();
 }
 
 // Order is specified using the same contract as comparePositions.
 static bool arePositionsInSpecifiedOrder(const VisiblePosition& vp1,
                                          const VisiblePosition& vp2,
                                          int specifiedOrder) {
   int positionOrder = comparePositions(vp1, vp2);
   if (specifiedOrder == 0)
     return positionOrder == 0;
   return specifiedOrder > 0 ? positionOrder > 0 : positionOrder < 0;
@@ skipping 238 matching lines @@
   m_diffExtentPointFromExtentPosition =
       extentPoint + IntSize(m_offset, 0) - positionLocation(newSelectionExtent);
   return createVisibleSelection(
       SelectionInDOMTree::Builder(selection.asSelection())
           .collapse(selection.base())
           .extend(newSelectionExtent.deepEquivalent())
           .build());
 }
 
 }  // namespace blink