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

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

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 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
@@ skipping 2534 matching lines @@
       computeInlineBoxPosition(position.position(), position.affinity());
 
   if (boxPosition.inlineBox)
     layoutObject = LineLayoutAPIShim::layoutObjectFrom(
         boxPosition.inlineBox->getLineLayoutItem());
 
   return layoutObject->localCaretRect(boxPosition.inlineBox,
                                       boxPosition.offsetInBox);
 }
 
-// This function was added because the caret rect that will be calcaulated by
+// This function was added because the caret rect that is calculated by
 // using the line top value instead of the selection top.
 template <typename Strategy>
 LayoutRect localSelectionRectOfPositionTemplate(
     const PositionWithAffinityTemplate<Strategy>& position,
     LayoutObject*& layoutObject) {
   LayoutRect rect = localCaretRectOfPositionTemplate(position, layoutObject);
 
   if (rect.isEmpty())
     return rect;
 
@@ skipping 1335 matching lines @@
 
 VisiblePositionInFlatTree previousPositionOf(
     const VisiblePositionInFlatTree& visiblePosition,
     EditingBoundaryCrossingRule rule) {
   DCHECK(visiblePosition.isValid()) << visiblePosition;
   return previousPositionOfAlgorithm<EditingInFlatTreeStrategy>(
       visiblePosition.deepEquivalent(), rule);
 }
 
 }  // namespace blink