Convert some call sites to use explicit LayoutRect->FloatRect conversion.

Source/core/layout/LayoutInline.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 1008 matching lines @@
 
     FloatRect floatResult;
     LinesBoundingBoxGeneratorContext context(floatResult);
 
     LayoutInline* endContinuation = inlineElementContinuation();
     while (LayoutInline* nextContinuation = endContinuation->inlineElementContinuation())
         endContinuation = nextContinuation;
 
     for (LayoutBlock* currBlock = containingBlock(); currBlock && currBlock->isAnonymousBlock(); currBlock = toLayoutBlock(currBlock->nextSibling())) {
         for (LayoutObject* curr = currBlock->firstChild(); curr; curr = curr->nextSibling()) {
-            LayoutRect rect = curr->clippedOverflowRectForPaintInvalidation(view());
-            context(rect);
+            LayoutRect rect(curr->clippedOverflowRectForPaintInvalidation(view()));
+            context(FloatRect(rect));
             if (curr == endContinuation)
                 return LayoutRect(enclosingIntRect(floatResult));
         }
     }
     return LayoutRect();
 }
 
 LayoutRect LayoutInline::clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
 {
     // If we don't create line boxes, we don't have any invalidations to do.
@@ skipping 388 matching lines @@
 }
 
 void LayoutInline::invalidateDisplayItemClients(const LayoutBoxModelObject& paintInvalidationContainer) const
 {
     LayoutBoxModelObject::invalidateDisplayItemClients(paintInvalidationContainer);
     for (InlineFlowBox* box = firstLineBox(); box; box = box->nextLineBox())
         paintInvalidationContainer.invalidateDisplayItemClientOnBacking(*box);
 }
 
 } // namespace blink