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

Source/core/layout/compositing/CompositingInputsUpdater.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/layout/compositing/CompositingInputsUpdater.h"
 
 #include "core/layout/LayoutBlock.h"
 #include "core/layout/compositing/CompositedDeprecatedPaintLayerMapping.h"
 #include "core/layout/compositing/DeprecatedPaintLayerCompositor.h"
@@ skipping 95 matching lines @@
     if (layer->needsCompositingInputsUpdate()) {
         if (info.enclosingCompositedLayer)
             info.enclosingCompositedLayer->compositedDeprecatedPaintLayerMapping()->setNeedsGraphicsLayerUpdate(GraphicsLayerUpdateSubtree);
         updateType = ForceUpdate;
     }
 
     if (updateType == ForceUpdate) {
         DeprecatedPaintLayer::AncestorDependentCompositingInputs properties;
 
         if (!layer->isRootLayer()) {
-            properties.clippedAbsoluteBoundingBox = enclosingIntRect(m_geometryMap.absoluteRect(layer->boundingBoxForCompositingOverlapTest()));
+            properties.clippedAbsoluteBoundingBox = enclosingIntRect(m_geometryMap.absoluteRect(FloatRect(layer->boundingBoxForCompositingOverlapTest())));
             // FIXME: Setting the absBounds to 1x1 instead of 0x0 makes very little sense,
             // but removing this code will make JSGameBench sad.
             // See https://codereview.chromium.org/13912020/
             if (properties.clippedAbsoluteBoundingBox.isEmpty())
                 properties.clippedAbsoluteBoundingBox.setSize(IntSize(1, 1));
 
             IntRect clipRect = pixelSnappedIntRect(layer->clipper().backgroundClipRect(ClipRectsContext(m_rootLayer, AbsoluteClipRects)).rect());
             properties.clippedAbsoluteBoundingBox.intersect(clipRect);
 
             const DeprecatedPaintLayer* parent = layer->parent();
@@ skipping 67 matching lines @@
     ASSERT(!layer->childNeedsCompositingInputsUpdate());
     ASSERT(!layer->needsCompositingInputsUpdate());
 
     for (DeprecatedPaintLayer* child = layer->firstChild(); child; child = child->nextSibling())
         assertNeedsCompositingInputsUpdateBitsCleared(child);
 }
 
 #endif
 
 } // namespace blink