Fix subpixel accumulation for composited content layers

third_party/WebKit/Source/core/layout/LayoutVideo.cpp

 /*
  * Copyright (C) 2007, 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 104 matching lines @@
     // even if we know the video intrinsic size but aren't able to draw video frames yet
     // (we don't want to scale the poster to the video size without keeping aspect ratio).
     if (videoElement()->shouldDisplayPosterImage())
         m_cachedImageSize = intrinsicSize();
 
     // The intrinsic size is now that of the image, but in case we already had the
     // intrinsic size of the video we call this here to restore the video size.
     updateIntrinsicSize();
 }
 
-IntRect LayoutVideo::videoBox() const
+LayoutRect LayoutVideo::videoBox() const
 {
     const LayoutSize* overriddenIntrinsicSize = nullptr;
     if (videoElement()->shouldDisplayPosterImage())
         overriddenIntrinsicSize = &m_cachedImageSize;
 
-    return pixelSnappedIntRect(replacedContentRect(overriddenIntrinsicSize));
+    return replacedContentRect(overriddenIntrinsicSize);
 }
 
 bool LayoutVideo::shouldDisplayVideo() const
 {
     return !videoElement()->shouldDisplayPosterImage();
 }
 
 void LayoutVideo::paintReplaced(const PaintInfo& paintInfo, const LayoutPoint& paintOffset) const
 {
     VideoPainter(*this).paintReplaced(paintInfo, paintOffset);
@@ skipping 59 matching lines @@
     if (element->isFullscreen() && element->usesOverlayFullscreenVideo())
         return CompositingReasonVideo;
 
     if (shouldDisplayVideo() && supportsAcceleratedRendering())
         return CompositingReasonVideo;
 
     return CompositingReasonNone;
 }
 
 } // namespace blink