Make the FloatSize constructor from an IntSize explicit.

third_party/WebKit/Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 3532 matching lines @@
 {
     if (!graphicsLayer || !scrollbar)
         return;
 
     IntRect scrollbarRect = scrollbar->frameRect();
     graphicsLayer->setPosition(scrollbarRect.location());
 
     if (scrollbarRect.size() == graphicsLayer->size())
         return;
 
-    graphicsLayer->setSize(scrollbarRect.size());
+    graphicsLayer->setSize(FloatSize(scrollbarRect.size()));
 
     if (graphicsLayer->hasContentsLayer()) {
         graphicsLayer->setContentsRect(IntRect(0, 0, scrollbarRect.width(), scrollbarRect.height()));
         return;
     }
 
     graphicsLayer->setDrawsContent(true);
     graphicsLayer->setNeedsDisplay();
 }
 
 static void positionScrollCornerLayer(GraphicsLayer* graphicsLayer, const IntRect& cornerRect)
 {
     if (!graphicsLayer)
         return;
     graphicsLayer->setDrawsContent(!cornerRect.isEmpty());
     graphicsLayer->setPosition(cornerRect.location());
     if (cornerRect.size() != graphicsLayer->size())
         graphicsLayer->setNeedsDisplay();
-    graphicsLayer->setSize(cornerRect.size());
+    graphicsLayer->setSize(FloatSize(cornerRect.size()));
 }
 
 void FrameView::positionScrollbarLayers()
 {
     positionScrollbarLayer(layerForHorizontalScrollbar(), horizontalScrollbar());
     positionScrollbarLayer(layerForVerticalScrollbar(), verticalScrollbar());
     positionScrollCornerLayer(layerForScrollCorner(), scrollCornerRect());
 }
 
 bool FrameView::userInputScrollable(ScrollbarOrientation orientation) const
@@ skipping 394 matching lines @@
     return m_hiddenForThrottling && m_crossOriginForThrottling;
 }
 
 LayoutBox& FrameView::boxForScrollControlPaintInvalidation() const
 {
     ASSERT(layoutView());
     return *layoutView();
 }
 
 } // namespace blink