Don't round the paint offset when painting carets.

third_party/WebKit/Source/core/editing/CaretBase.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 175 matching lines @@
 }
 
 void CaretBase::paintCaret(Node* node, GraphicsContext& context, const LayoutPoint& paintOffset, DisplayItem::Type displayItemType) const
 {
     if (DrawingRecorder::useCachedDrawingIfPossible(context, *this, displayItemType))
         return;
 
     LayoutRect drawingRect = localCaretRectWithoutUpdate();
     if (LayoutBlock* layoutObject = caretLayoutObject(node))
         layoutObject->flipForWritingMode(drawingRect);
-    drawingRect.moveBy(roundedIntPoint(paintOffset));
+    drawingRect.moveBy(paintOffset);
 
     const Color caretColor = node->layoutObject()->resolveColor(CSSPropertyColor);
     IntRect paintRect = pixelSnappedIntRect(drawingRect);
     DrawingRecorder drawingRecorder(context, *this, DisplayItem::kCaret, paintRect);
     context.fillRect(paintRect, caretColor);
 }
 
 String CaretBase::debugName() const
 {
     return "Caret";
 }
 
 LayoutRect CaretBase::visualRect() const
 {
     return m_visualRect;
 }
 
 } // namespace blink