Make the constructor of a LayoutRect from an IntRect explicit.

Source/core/paint/VideoPainter.cpp

 // Copyright 2014 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 "config.h"
 #include "core/paint/VideoPainter.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/FrameView.h"
 #include "core/html/HTMLVideoElement.h"
 #include "core/layout/LayoutVideo.h"
 #include "core/layout/PaintInfo.h"
 #include "core/paint/ImagePainter.h"
 #include "platform/geometry/LayoutPoint.h"
 
 namespace blink {
 
 void VideoPainter::paintReplaced(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     WebMediaPlayer* mediaPlayer = m_layoutVideo.mediaElement()->webMediaPlayer();
     bool displayingPoster = m_layoutVideo.videoElement()->shouldDisplayPosterImage();
     if (!displayingPoster && !mediaPlayer)
         return;
 
-    LayoutRect rect = m_layoutVideo.videoBox();
+    LayoutRect rect(m_layoutVideo.videoBox());
     if (rect.isEmpty())
         return;
     rect.moveBy(paintOffset);
 
     LayoutRect contentRect = m_layoutVideo.contentBoxRect();
     contentRect.moveBy(paintOffset);
     GraphicsContext* context = paintInfo.context;
     bool clip = !contentRect.contains(rect);
     if (clip) {
         context->save();
         context->clip(contentRect);
     }
 
     if (displayingPoster)
         ImagePainter(m_layoutVideo).paintIntoRect(context, rect);
     else if ((m_layoutVideo.document().view() && m_layoutVideo.document().view()->paintBehavior() & PaintBehaviorFlattenCompositingLayers) || !m_layoutVideo.acceleratedRenderingInUse())
         m_layoutVideo.videoElement()->paintCurrentFrameInContext(context, pixelSnappedIntRect(rect));
 
     if (clip)
         context->restore();
 }
 
 } // namespace blink