Make the FloatSize constructor from an IntSize explicit.

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

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 915 matching lines @@
     if (host->settings().viewportEnabled() && frame->isMainFrame())
         frame->document()->updateLayoutIgnorePendingStylesheets();
 
     // FIXME: This is potentially too much work. We really only need to know the dimensions of the parent frame's layoutObject.
     if (Frame* parent = frame->tree().parent()) {
         if (parent && parent->isLocalFrame())
             toLocalFrame(parent)->document()->updateLayoutIgnorePendingStylesheets();
     }
 
     return frame->isMainFrame() && !host->settings().inertVisualViewport()
-        ? host->visualViewport().visibleRect().size()
-        : view->visibleContentRect(IncludeScrollbars).size();
+        ? FloatSize(host->visualViewport().visibleRect().size())
+        : FloatSize(view->visibleContentRect(IncludeScrollbars).size());
 }
 
 int LocalDOMWindow::innerHeight() const
 {
     if (!frame())
         return 0;
 
     FloatSize viewportSize = getViewportSize(frame());
     return adjustForAbsoluteZoom(expandedIntSize(viewportSize).height(), frame()->pageZoomFactor());
 }
@@ skipping 581 matching lines @@
 {
     // If the LocalDOMWindow still has a frame reference, that frame must point
     // back to this LocalDOMWindow: otherwise, it's easy to get into a situation
     // where script execution leaks between different LocalDOMWindows.
     if (m_frameObserver->frame())
         ASSERT_WITH_SECURITY_IMPLICATION(m_frameObserver->frame()->domWindow() == this);
     return m_frameObserver->frame();
 }
 
 } // namespace blink