Make the FloatSize constructor from an IntSize explicit.

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2917 matching lines @@
     // If the box is partially offscreen and it's possible to bring it fully
     // onscreen, then animate.
     if (visualViewport.visibleRect().width() >= textboxRectInDocument.width()
         && visualViewport.visibleRect().height() >= textboxRectInDocument.height()
         && !visualViewport.visibleRectInDocument().contains(textboxRectInDocument))
         needAnimation = true;
 
     if (!needAnimation)
         return;
 
-    FloatSize targetViewportSize = visualViewport.size();
+    FloatSize targetViewportSize(visualViewport.size());
     targetViewportSize.scale(1 / newScale);
 
     if (textboxRectInDocument.width() <= targetViewportSize.width()) {
         // Field is narrower than screen. Try to leave padding on left so field's
         // label is visible, but it's more important to ensure entire field is
         // onscreen.
         int idealLeftPadding = targetViewportSize.width() * leftBoxRatio;
         int maxLeftPaddingKeepingBoxOnscreen = targetViewportSize.width() - textboxRectInDocument.width();
         newScroll.setX(textboxRectInDocument.x() - std::min<int>(idealLeftPadding, maxLeftPaddingKeepingBoxOnscreen));
     } else {
@@ skipping 1517 matching lines @@
     if (m_pageColorOverlay)
         m_pageColorOverlay->update();
     if (InspectorOverlay* overlay = inspectorOverlay()) {
         PageOverlay* inspectorPageOverlay = overlay->pageOverlay();
         if (inspectorPageOverlay)
             inspectorPageOverlay->update();
     }
 }
 
 } // namespace blink